Answer:
There are 118 elements in the nature.
Metals s = 92
Non metals = 20
Metalloids Ms = 6
Explanation:
11) When sodium metal is subjected to violet light, it causes the photoelectric effect. However, red light does not affect
the sodium. Explain this phenomena.
The phenomena in which violet light causes photoelectric effect and red light does not is because red light does not achieve the minimum frequency for the phenomenon to occur but violet light does.
The phenomenon in which a substance emits electrons when light is incident upon it is called the photoelectric effect.
This electron would not be emitted if the frequency of the light does not exceed a minimum frequency called the threshold frequency.
Since in the case of the sodium metal, violet light causes the photoelectric effect while red light does not.
This implies that red light does not exceed the minimum frequency for the photoelectric effect to occur, but violet light does thereby causing the photoelectric effect to occur.
So, the phenomena in which violet light causes photoelectric effect and red light does not is because red light does not achieve the minimum frequency for the phenomenon to occur but violet light does.
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When table salt forms, which action occurs between the reacting elements? (1 point)
O Chlorine donates an electron to sodium.
Sodium shares an electron with chlorine. O Sodium donates an electron to chlorine.
O Chlorine exchanges an electron with sodium.
Answer: C: Sodium donates an electron to chlorine.
Explanation:
Sodium wants to lose an electron and chlorine wants to gain an electron to become stable. This is because of their place in the periodic table, sodium being on the very left edge and chlorine on the very right (noble gasses dont count as they are stable to begin with)
Therefore sodium will donate to chlorine so they both become stable with an ionic bond. (another way to tell its ionic is the very large difference in electronegativity)
When table salt forms, sodium donates an electron to chlorine resulting in the formation of bond which is formed when the electronic configurations become stable.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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What is the mass of 1.20 × 1023 atoms of phosphorus?
show your work, please.
1227.6
Explanation:
po ang sagot khit i calculate nyo
What happens during liquefaction?
Answer:
it becomes water of it liqud
Explanation:
il explain in comment if you brainly me
What are compounds????????????????
Answer:
Compounds are pure substance consisting of two or more different atoms
Answer:
I hope this help
Explanation:
pls brainliest
What is an activation energy
Answer:
Defination of Activation energy :- In chemistry and physics, activation energy is the minimum amount of energy that must be provided for compounds to result in a chemical reaction. The activation energy of a reaction is measured in joules per mole, kilojoules per mole or kilocalories per mole. Meaning of Activation energy :- The minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.Explanation:
Hope this helps you dear ✌️Carry on learning !!please help me I need it now
Answer:
Ok for the question you can make up your own
If you can't make up your own tell me so I can try my best to come up with questions
1. Answer: Since and last are adverbs so am not sure how that part going to go
Type of Adverb for since is: Time
Type of Adverb for last is : Time
2. Question:
Answer: happily
Type: Manner
Hopes this helps you.
ANSWER ASAP!!!! WILL GIVE BRAINLIEST IF RIGHT
Coal and diamond are both minerals .they are both expensive.why
Answer:
hard to find
Explanation:
Answer:
because actually diamonds is coal.
Explanation:
how diamonds is coal? because when the coal gets very high pressure it turns into diamonds.
A mystery element has 18 protons. Which one of the following statements is true about the element?
a.The element belongs in row 2 of the periodic table and is classified as a halogen.
b.The element belongs in row 3 of the periodic table and is classified as a noble gas.
c.The element belongs in row 4 of the periodic table and is classified as an alkali metal.
d.The element belongs in row 5 of the periodic table and is classified as an alkaline earth metal.
Answer:
its aragon , so letter b is right
Explanation:
give the symbol and the nuclei number of an isotope that is used as a nuclear fuel
Answer: The nuclear symbol of an isotope indicates the number of protons and neutrons in an atom of the element. It does not indicate the number of electrons. The number of neutrons is not stated. Instead, you have to figure it out based on the number of protons or atomic number.
Explanation:
brain me
A-10
A-6
Group mL A-8 mL mL A-2mL
1 10.6 8 6.2 2.1
2
9
9 7
N
3
11
9
7
3
4
10.4
8.4
6.2
2.1
5
10.39
8.39
6.3
2.3
6
11
9
7
3
Answer: good
Explanation:
tyuk
a student is given a mixture of sand and salt. describe a method the student could use to separate the mixture.
There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
What is solution?Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution.
Solute is the substance which is in small amount in a solution. Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
Therefore, Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
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A student draws a model of one of the sun's layers. The student draws arrows to represent hot gas moving away from the center of the sun and other arrows to represent cool gas moving toward the center of the sun. Which layer does the model show?
Radiation Zone
Convection Zone
Chromosphere
Inner Core
Answer:
The convection zone :)
Figure 5 shows how the temperature of a substance changed as it was heated. Which segment of the graph indicates that the substance was undergoing a change of state?
answer:
B
Why:
Because when heated up, the particles vibrate from the heat and keep on vibrating.
at point b of the diagram, the energy is gone to breaking bonds of the (let's assume) solid.
So there is no change in temperature.
I hope this helps please let me know if you need me to explain more.
When temperature is changing with respect to the time in the given graph, then substance B was undergoing a change of state.
What is change of state?When any substance converts from one form of matter to the other form, then this phenomenon is known as change of state.
In the given figure a graph represents the change in temperature of substances A, B, C and D with respect to the time. Temperature of the substances A, C & D keep continuous changing with respect to the time. But substance B shows change in state because it absorbs the heat to convert in another state by breaking old bonds and making new bonds and showing showing no change in temperature.
Hence, substance B was undergoing a change of state.
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HELPPPPPPPPPPPPPPPPPPPPPPPP
What is the difference between a producer and a consumer? (Select all that apply.)
Consumers can make their own food energy and producers cannot.
Producers convert sunlight energy into fuel and consumers cannot.
Consumers convert sunlight energy into fuel and producers cannot.
Producers can make their own food energy and consumers cannot.
Answer:
producers convery sunlight energy into fuel and consumers cannot
producers can make their own food energy and consumers cannot
A chemical property is a change in _____.
hardness
density
composition of matter
physical state
Answer:
Composition of matter
What is a solvent? please answer
A. The material that is dissolved
B. The material that increases the speed of the dissolution
C. The material that reduces how much can be dissolved
D. The material that is dissolving another material
WILL MARK BRAINLIEST
Answer:
D
Explanation:
Solvent is the material that is dissolving another material. Thus, option D is correct.
A solvent is a substance that dissolves another substance to form a solution. The substance that is being dissolved is called the solute, and the substance that is doing the dissolving is called the solvent. The solute is usually present in a smaller amount than the solvent, and it is the solvent that determines the physical properties of the solution, such as its density, viscosity, and boiling point.
For example, when salt is dissolved in water, the salt is the solute and the water is the solvent. The water molecules surround the salt molecules and break them apart, so that the salt ions are free to move around in the solution. The solution is then a homogeneous mixture of salt ions and water molecules.
Thus, option D is correct.
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in space why is it black in space except the planets
Answer:
because space is near-perfect vacuum - meaning it has exceedingly few particles- there is virtually nothing in the space between stars and planets to scatter light to our eyes
this is because the blank attractive forces between the ions result in a very blank structure
Answer:
This is because the large attractive forces between the ions result in a very stable structure.
A GIRL WAIKS 10M NORTH,15M EAST AND THEN FINALLY 20MSOUTH FIND HER DISPLACEMENT
Answer:
see this
Explanation:
how long do you have to cook a turkey after it thaws
Answer:
Explanation:
A thawed turkey can remain in the refrigerator for 1 to 2 days. If necessary, a turkey that has been properly thawed in the refrigerator may be refrozen.
...
Thawing Your Turkey.
Thawing in cold water Time to thaw (allow 30 minutes per pound)
16 to 20 pounds 8 to 10 hours
20 to 24 pounds 10 to 12 hours
Explain why the structure of Copper [ 1s², 2s², 2p⁶, 3s², 3p⁶, 3d¹⁰,4s¹] is more stable than [ 1s², 2s², 2p⁶, 3s, 3p²⁶, 3d⁹,4s² ].
A subshell which is 100% full or 50% full is more stable than subshells which are partially filled with a number of electrons less than or greater than half the number of electrons which can be held by the subshell.
Explanation:
which of the following are physical properties of nonmentals
You did not provide any options.
Please help. 100 points
Carbon-12, Carbon-13, Carbon-14
1. The numbers 12, 13, and 14 refer to what
2. What subatomic particle makes each of these isotopes different?
3. What subatomic particle makes each of these isotopes the same?
Graphite conducts heat in a similar way to metals because it contains __________ __________. What two words complete the sentence?
Answer:
Free electrons
Explanation:
Graphite conducts heat in a similar way to metals because it contains free electrons.
Conductivity is arised from the delocalization of free electrons. Metals are electron rich and conduct thermally and electrically. Graphite conducts heat in a similar way because it contain delocalized electrons.
What is graphite?Graphite is an allotrope of carbon as diamond and fullerenes. Graphite exhibits a layered helical structures in which the carbon atoms are arranged in a hexagonal fashion.
Substances conduct electricity and heat when they are rich in electrons and are mobile to pass through it. Metals are electropositive and they contains extra electrons which can be delocalized between orbitals or energy levels.
This delocalization of electrons results in an a thermal or electrical current in the substance. Carbon is in sp2 hybridisation in graphite. Where, the electrons can transit from one layer to the other in the layered structure.
Therefore, the presence of delocalized electrons make graphite conducting.
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Though hydrochloric acid is formed inside our body, it is not called organic acid. Why?
Explanation:
Hydrochloric acid does not consider as organic acid because of the absence of carbon in it.
hope it helps
An isotope of nitrogen experiences the weak force which transforms one of its
protons to a neutron. How would this change the atom?
Select one:
O a. It would have no effect because nitrogen still has the same mass
number.
O b. It would transform the nitrogen atom to a carbon atom.
It would make the atom transform it into a heavier isotope of nitrogen.
O d. It would transform nitrogen to an oxygen atom.
Check
Answer:
It would transform the nitrogen atom to a carbon atom
Explanation:
What is acid rainnnnnn
Answer:
ACID RAIN
Explanation:
duh
Do all particles pass right through the atoms undeflected?
Answer:
no when Rutherford performed the gold foil experiment he bombard the atom alpha particles and two other scientist, Geiger and Marsden came with great news saying the particles suffered serious deflection
