Answer:
Francium (Fr)
Explanation:
From the given choices, francium will have the lowest ionization energy.
Ionization energy is the energy required to remove the most loosely held electron within an atom.
The magnitude of the ionization energy depends on the characteristics of the atom in relation to its nuclear charge, atomic radius, stability etc.
Generally on the periodic table, ionization energy increases from left to right on the tableAs you go from metals to non-metals and to gases, the value of the ionization energy increases steadily. Down the group, the value reduces. Since Francium is the most metallic of all the given choices, it has the highest ionization energy.the moon changing positions causes all of the following except one of these. which is not caused by the moon changing positions?
A. Phases of the moon
B. Eclipse
C. Weather
D. Tides
Answer:
A.phase of moon
I hope it helps you
What effect does reusing or recycling municipal waste have on environmental resources? Group of answer choices increased use of fossil fuels preservation of raw materials introduction of pollutants into water systems increased deforestation of local areas
Answer:
preservation of raw materials
Explanation:
Reusing and recycling is the process by which the used products are used again or recycled in different form to use it again. Excessive use of the raw materials can lead to their extinction. Recycling the materials helps in decreasing the pollution in the environment. It also helps in reduction in the emission of the harmful gases. When municipal wastes are reused or recycled, the raw materials are preserved. These are the process involved in sustainable use of resources.
.
A light wave bends to pass through a crack underneath a door. What type of interaction is this?
Answer:
C
Explanation:
Interference trust me I just did this
A light wave bends to pass through a crack underneath a door, this represents interference. The correct option is option C.
What is light wave?Like other waves, light waves also transfer energy to a source. They are made up of tiny energy particles known as photons. While photons have no mass, they do have momentum and energy.
There are types of light waves which human eyes cannot perceive, just as there are noises that can't be recognized because they fall outside the range of human hearing. However, all forms of waves share characteristics like wavelength and frequency. Wavelength is the separation between neighboring wave components (e.g., crest to crest or trough to trough). A light wave bends to pass through a crack underneath a door, this represents interference.
Therefore, the correct option is option C.
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The bonds in carbon dioxide have an electronegativity difference of 1.0 whereas the electronegativity difference in the oxygen molecule is 0.0. How would you explain to a grade 10 student that both of these molecules are gases at room temperature?
Answer:
See explanation
Explanation:
All gases are held together by weak dispersion forces. One would now ask; Since the electronegativity difference between carbon and oxygen is about 1.0 while the electronegativity difference between two oxygen atoms is 0.0, why are they both gases at room temperature?
The answer lies in the recognition of two facts;
1) The dipole moment is a vector quantity so we also consider its direction
2) possession of polar bonds does not necessarily make a polar molecule.
We all know that a polar molecule will have greater intermolecular forces between its molecules and will most likely be a liquid instead of a gas. However,if we look at the overall dipole moment in CO2, we will notice that the direction of the dipole moment due to the two C-O bonds are opposite to each other hence they cancel out each other leaving the CO2 molecule with a zero effective dipole moment just as oxygen gas.
Hence, possession of polar bonds does not necessarily make a polar molecule. Therefore both oxygen and CO2 are gases at room temperature.
IV. Provide the chemical Name of below acid or base.
(a) Vinegar
(b) Fruits (orange)
(c) Curd
(d) Lime water
(e) Window cleaner
(f) Soap
V. When ‘X’ is added to ‘Y’ immediately ‘Y” turns to pink. Identify X.
VI. Give examples of a common acid and a common salt. Compare their composition. How do they differ and what do they have in common?
VII. Explain why pickles and jams should not be stored in metal containers.
VIII. Differentiate between weak acid and strong acid.
IX. Explain the reaction involved in the formation of sodium
chloride.
X. Why does a doctor give an antacid to treat indigestion?
Answer:
A)Acetic acid
a)citric acid
b)lactic acid
c)citric acid
d)NH3
f)oxygen hidro-oxide
Explanation:
Explain why a flash of green light made flubber so energetic
Answer:
The flash of green light may give off some type of energy that only emits from green light which probably energizes the Flubber
Explanation:
A flubber is a rubber like polymer that absorbs and amplifies energy. A flubber absorbs energy from a light source and electrons present in it are excited in order to emit light of higher wavelength. The green light absorbed by the flubber to emit longer wavelength of light emitting more energy.
Which metal pan should the chef choose because it undergoes the largest temperature change for a given input of energy?
The chef should choose the copper pan.
The chef should choose the iron pan.
The chef should choose the aluminum pan.
The chef can choose any of the three pans, because all three pans will undergo the same amount of temperature change.
Answer:
If the chef is in a hurry we would assume he would want the pan to heat up so copper
Explanation:
Answer:
A. The chef should choose the copper pan.
Explanation:
Copper conducts heat well because its atoms contain only one free valence electrons in the outer shell. Elements with a low number of valence electrons transfer heat the best, and copper has only one. Valence electrons move about freely.
Good luck on your test (Or whatever it is) !!
In an experiment, chemists heated a solid, red substance in a test tube. Vapors from the heated red substance condensed as a metallic liquid on the side of the tube. The red substance eventually disappeared, leaving only the metallic liquid and producing a gas that escaped from the tube. Which statement best describes what happened to the red substance in this experiment?
A.
The experiment demonstrates the formation of plasma from the red substance.
B.
The experiment demonstrates a physical property of the red substance.
C.
The experiment shows that the red substance experienced a chemical change.
D.
The experiment shows that the red substance can be a solid, liquid, or gas.
E.
The experiment shows that the red substance is an element.
Answer:
c
Explanation:
Answer:
C. The experiment shows that the red substance experienced a chemical change.
An atom has 15 electrons. How many are on each shell? *
0 2,8,7
0 2,8,5
8,7
15
Answer:
So... for the element of PHOSPHORUS, you already know that the atomic number tells you the number of electrons. That means there are 15 electrons in a Phosphorus atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and five in shell three.
What is magnetic force ? How is the this force
4 Sી ભIndSCO
Answer:
Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. ... The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other.
Explanation:
brainlest pls
[tex] \huge \boxed{\mathbb{QUESTION} \downarrow}[/tex]
What's magnetic force ?[tex] \huge \boxed{\mathfrak{Answer} \downarrow}[/tex]
Magnetic force is referred to as the force/phenomenon which is exerted by a magnet when they attract or repel each other through the poles. It's produced by an electric charge.There are 2 poles ⇨ i) North Pole & ii) South Pole.The like pole repel each other while the different poles attract each other. Magnetism is also known as magnetism or magnetic attraction.2. The state of matter with a definite shape and volume is.
A. matter
B. solid
C. liquid
D. gas
Answer:
solids
Explanation:
Solid is A substance with definite volume and shape. Solids do not flow and therefore do not conform to the shape of their containers. Liquid - A substance with definite volume but without definite shape
Answer:B-Solids
Explanation:
Which statement describes the water gas particles in the air above the cup compared with the water liquid
particles in the cup?
The partides move faster and are closer together
The particles move faster and are far apart
The particles move slower and are closer together
The particles move slower and are far apart
Answer:
The particles move faster and are far apart
Explanation:
A substance may exist in three states of matter; solid, liquid and gas.
In the solid state, there is very strong intermolecular forces between the particles of the substance. They can only vibrate or rotate about their mean positions but can not translate.
In the liquid state, the particles of the substance have a greater degree of freedom than in the solid. The magnitude of intermolecular forces is lower than in solids, the molecules can move at low speeds.
In a gas, the molecules are separated from each other with negligible intermolecular interaction hence they move at very high speed.
Therefore, for the water gas particles in the air above the cup; the particles move faster and are far apart.
What is the number of valance electrons for oxygen
Answer:
six
Explanation:
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.
Answer:
Six!
Explanation:
Valence electrons are the electrons in the outermost shell of an atom.
What will cause an object to move?
What are the two measurement systems the thermometer uses? Which one is commonly used for science? Why?
Answer:
The two measurement systems that the thermometer uses are Fahrenheit and Celcius. The scientists mostly use degree celsius.
This substance can be either homogeneous or heterogeneous.
element
compound
mixture
pure substance
Answer:
I think it's Element and compound
Explanation:
HELP!!! name two properties of metals
Answer:
1) Ductile
2) Malleable
please mark brainlest if right
Explanation:
ANSWER THESE 5 MULTPLE CHOICE QUESTIONS!!!
I'LL GIVE 30 POINTS AND A BRAINIEST:)
Answer: 1, magnesium & mg
2, two energy shells
Explanation:
Can someone help me please!
True or False:
At room temperature and 1 atm, covalent crystals are solid.
a. True
b. False
PLEASE HELP ASAP!
The sample of gas is in a container with a fixed volume. A student notices that as the temperature increases so does the
pressure. This is a(n) ___
relationship.
There aren’t any answer choices.
Answer:
Direct
Explanation:
Edge
When the temperature increases with an increase in pressure, it is a direct relationship.
What is Gay Lussac's law?Gay-Lussac's law can be described as when the volume of the gas remains constant then the pressure of a gas is directly proportional to the absolute temperature of the gas.
The mathematical equation of Gay Lussca's law is written as follows:
P/T = k
It can be represented as the pressure is directly proportional to the absolute temperature.
P ∝ T (where 'V' volume of gas is constant)
or
[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2}[/tex]
Where P₁ and T₁ are the initial temperature and pressure while P₂ and T₂ are the final pressure and temperature of the gas.
The sample of gas has a fixed volume of gas and on increasing the temperature the gas molecules acquire more and more kinetic energy. So the pressure of the gas will also increase.
Therefore, there will be a direct relationship between temperature and pressure of gas.
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Simple conversions
You bought your pig and it weighed 82 pounds. By fair your goal weight is 267 pounds. Your pig will gain 1 pound for every 3 pounds of feed. How much feed will you need to get your pig to it's goal weight? (show your work) (5) Feed costs $21.37 per 50 pound bag. How much will your feed cost be, to get your pig to it's goal weight? (5) MUST SHOW ALL WORK.
Number of feed = 555 pounds
Feed cost = $237.21
Further explanationThe main composition of algebraic expressions are:
• 1. phrases/terms
• 2. variable
• 3. constants
• 4. arithmetic operations
• 5. coefficients
• 6. exponent
Initial weight = 82 pounds
Goal weight = 267 pounds
The difference in weight that must be achieved :
[tex]\tt 267-82=185~pounds[/tex]
The pig will gain 1 pound for every 3 pounds of feed⇒ 1 pound weight=3 pounds of feed
The amount of feed must be given:
[tex]\tt 185~pounds~weight\times 3~pounds~feed=555~pounds~of~feed[/tex]
Feed costs $21.37 per 50 pound bag, so for 555 pounds :
[tex]\tt (555~pounds\div 50)\times \$21.37=\$237.21[/tex]
How many moles are there in 8.50 X 1024 molecules of sodium sulfate, Na2SO3?
Answer:
14.12 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{8.50 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 14.119601...[/tex]
We have the final answer as
14.12 molesHope this helps you
Many plants in rainforests have leaf tips that come to a point, so precipitation drains off the leaf. This helps to keep the plant safe from harmful germs. Based on this info, what resource is prevalent in a rainforest?
Answer:
rainfall/water
Explanation:
The possession of drip tips by the leaves of plants in the rainforest is a form of adaptation against high rainfall. Without the drip tips on leaves, water will persist on the surface of leaves, and in conjunction with the warm climate, promotes the growth of pathogens such as fungi and bacteria.
Hence, the possession of drip tips on leaves is an indication of the prevalence of water in the rainforest region.
Can someone answer this pleasee it’s free 15 points
I don’t know
but thank u for the points
I need points hehe
Did you know?
Hawaii is the Widest State in America!!!!!!!
According to the model, at which time in the northern hemisphere is Earth's
north pole tilted toward the Sun?
A. Winter solstice
B. Summer solstice
C. Spring equinox
D. Fall equinox
Answer:
(B) summer solstice
Explanation: hope this helps!
how many neutrons does this atom have?
A. 4
B. 6
C. 10
D. 14
((help. I'm timed so please be quick ;-;
Answer:
the ander is B. 6 neurons
Answer:
10
Explanation:
which of the below would result in rearrangement of atoms at molecular level
a) salt dissolved in water
b) broken tree branches
c) gasoline combusts in an engine
d) steam rising from hot pavement
The best answer is
A) The atoms in the mineral get rearranged
Explanation:
How many valence electrons does an atom of oxygen have and what noble 1 point
gas will it be most like after forming a chemical bond? *
1)8 electrons and neon
2)2 electrons and fluorine
3)6 electrons and neon
4)6 electrons and argon
3)6 electrons and neon
Further explanationIn an atom there are levels of energy in the shell and sub shell
This energy level is expressed in the form of electron configurations.
The electron configuration Oxygen (atomic number = 8) :
1s²2s²2p⁴
Oxygen will try to achieve stability (according to the octet rule) by binding 2 electrons so that the 2p orbits are filled with 6 electrons, so that the configuration is stable like the noble gases Neon
₁₀Ne = 1s² 2s² 2p⁶
Which scenario would result in a population growth of zero?
Use this formula:
population growth = (birth rate + immigration) – (death rate + emigration)
A. 12 individuals emigrate, 12 individuals die, 12 individuals are born, 0 individuals immigrate
B. 16 individuals emigrate, 3 individuals die, 13 individuals are born, 0 individuals immigrate
C. 8 individuals emigrate, 0 individuals die, 20 individuals immigrate,12 individuals are born
D. 10 individuals emigrate, 4 individuals die, 14 individuals immigrate, 0 individuals are born
Answer:
D. 10 individuals emigrate, 4 individuals die, 14 individuals immigrate, 0 individuals are born
Explanation:
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