(c) Magnesium has atomic number 12.
Magnesium exists as magnesium-24, magnesium-25 and magnesium-26 atoms.
Explain, in terms of protons and neutrons, why these atoms are isotopes
of magnesium
(2)
PLEASE HELP URGENT
Answers
Answer: The magnesium 24, 25, and 26 atoms are isotopes because they all have the same number of protons but they have different mass numbers
Explanation: isotopes of an element have the same number of protons but different mass number. So for magnesium 24, the number of protons is 12 and the number of neutrons is 12.
For magnesium 25, the number of protons would still be 12 but the neutrons would be 13.
Magnesium 26, the number of protons would be 12 and neutrons number is 14
Related Questions
A car accelerates from 20 m/s to 40 m/s in 4 seconds. What is the car’s acceleration?
Answers
Answer:
40 - 20 = 20
20/4 = 5m/s
The difference in velocity divided by the rate = acceleration.
what happens when u mix blood and water
Answers
Answer:
Blood and water
Explanation:
how does a drupe fruit differ from a hesperidum fruit.
Answers
Answer:
hi
Explanation:
Answer:
Fleshy Fruits: All of most of the ovary wall (pericarp) is soft or fleshy at maturity. ... partitions, juicy seed vesicles, and a leathery exocarp similar to a hesperidium. ... This is a very common dry fruit found in many different plant families.
Explanation:
which one is ittt? help please:)
Answers
Answer:
b
Explanation:
You probably use the term heat many times a day. As an example, when you cook dinner, you heat your dinner on a hot stove. When you place a piece of cool metal in the sun, it is heated by the sun’s energy. Why is heat the correct term to use in these examples?
A. They show that when objects are touching, they are the same temperature.
B. They show that heat flows from something warmer to something cooler.
C. They indicate that heat is created to raise the temperature of something.
D. They indicate that the kinetic energy of the particles decreases when something is heated.
Answers
Answer:
c
Explanation:
9. Scientists are studying cellular respiration in a jungle ecosystem that has plants,
animals, and decomposers (which consume dead things). Which group or groups of
organisms in the jungle carry out cellular respiration?
plants
animals and decomposers
all organisms in the jungle
animals.
Answers
Answer:
all organisms in the jungle
Explanation:
Scientists are studying cellular respiration in a jungle ecosystem that has plants, animals and decomposers, so all organisms in the jungle carry out cellular respiration.
What is cellular respiration?Cellular respiration is a process in which organism use the oxygen molecule for the conversion of their food materials to get the chemical energy by the product of water and carbon dioxide.
This respiration process is done by all living organism like plants, animals, insects, bacteria, etc. to get energy for the other cellular functions. So, in the ecosystem of jungle plants, animals and decomposers all will perform cellular respiration.
Hence, option (c) is correct i.e. all organisms in the jungle.
To know more about cellular respiration, visit the below link:
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3
Question 6 (2 points)
An increase in the level of carbon dioxide in the atmosphere would result in:
Answers
Answer:
Air pollution
Explanation:
Carbon(IV)oxide is sometimes harmful to man but good for plant in other to manufacture their food
Someone help please!
Answers
Answer:
D
Explanation:
One day on her walk home from school, Leann noticed some rust on an old car.
She remembered that chemical equations can summarize what happens in a chemical reaction. What is the name of the two parts found on the left side of the equation below?
4 Fe + 3O2 → 2Fe2O3
Answers
Answer:
Iron and Oxygen
Explanation:
Fe is Iron and O2 is Oxygen
2. Stronger intermolecular forces =______ boiling point
Answers
Stronger intermolecular forces = higher boiling point
The stronger the intermolecular forces, the harder the molecules are to pull/break apart, which means a higher boiling point.
llodine solution is added to a sample taken from the boiling tube after 10 minutes and
60 minutes.
Suggest what you would see in these samples.
03
Answers
Answer:
I have no idea sorry but if you payed attention to what they are telling you you won't half to cheat
2) Check all that apply.
What are the three major groups of elements?
Answers
Answer:
metals, nonmetals and metalloids
Explanation:
2. Nonmetals
3. Metalloids
How well do you think scientists can predict where a volcano will erupt? How well do you think scientists can predict when a volcano will erupt? Explain.
Answers
Answer:
Volcanologists can predict eruptions if they have a thorough understanding of a volcano's eruptive history, if they can install the proper instrumentation on a volcano well in advance of an eruption, and if they can continuously monitor and adequately interpret data coming from that equipment.
Explanation:
HELP !!!!!!!!!!!!! PLEEEAAAAASSSSSSEEEE
Answers
spring equinox: march 21-22
summer solstice: june 20-21
winter solstice: december 21-22
fall equinox: september 22-23
Which phase of matter will take the shape of its container?
Answers
Answer:
Liquid
Explanation:
All liquids take the shape of the container
Unbend a paper clip such that
you have
a long, straight piece of metal. Bend one of the initially straight sections
back and forth several times. Does it become easier or harder to bend
the paper clip in the same spot? What happens if you keep bending the
paper clip back and forth?
uz RS nyodag
Answers
Metals have a crystalline in nature, and a consistent shift in stress causes the structure to alter, causing the metal to stiffen and fracture. This is known as metal fatige. The bending causes that to occur.
What is metal ?A metal is a substance that has a shiny look when freshly processed, polished, or shattered, and conducts electricity and heat rather effectively. Generally speaking, metals are malleable and ductile.
These characteristics are the outcome of the metallic link that exists between the metal's atoms or molecules.
The earth's crust is where most pure metals are found. They are discovered in ores, which are solid materials from which metals and minerals may be extracted. The majority of the planet's iron mass, which makes up over a third of its mass, is located in its core.
Thus, Metals have a crystalline in nature, and a consistent shift in stress causes the structure to alter.
To learn more about metal, follow the link;
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FB and were to bond the difference in electronegativity would be
and we would expect the bond to be
ionic covalent, poler covalent)
ASAP quick
Answers
again don’t quote me on it i’m just trying my best with what i remember
the structure and bonding of gold?
Answers
Answer:
metallic bonding
Explanation:
since it is a metal gold forms metalllic bonding.
Answer:
metalic bonding
Explanation:
How many moles is 118 grams of Argon
Answers
Answer:
[tex]\boxed {\boxed {\sf About \ 2.96 \ moles \ of \ Argon}}[/tex]
Explanation:
To convert from grams to moles we must use the molar mass, which is found on the Periodic Table.
Argon: 39.9 g/molUse the molar mass as a ratio.
[tex]\frac{39.9 \ g \ Ar}{1 \ mol \ Ar}[/tex]
Multiply by the given number of grams: 118
[tex]118 \ g \ Ar *\frac{39.9 \ g \ Ar}{1 \ mol \ Ar}[/tex]
Flip the fraction so the grams of argon will cancel each other out.
[tex]118 \ g\ Ar * \frac{1 \ mol \ Ar}{39.9 \ g \ Ar}[/tex]
[tex]118 * \frac{ 1 \ mol \ Ar}{39.9 \ g \ Ar}[/tex]
[tex]\frac {118 \ mol \ Ar }{ 39.9 }[/tex]
[tex]2.95739348 \ mol \ Ar[/tex]
The original measurement of grams had 3 significant figures, so our answer must have 3 sig figs.
For the number we calculated, that is the hundredth place. The 7 in the thousandth place tells us to round the 5 to a 6.
[tex]2.96 \ mol \ Ar[/tex]
There are about 2.96 moles of Argon in 118 grams.
How is the Periodic Table helpful to scientists?
Answers
Answer:
Because it helps predict the types of chemical reactions that a particular element is likely to participate in by telling each element's atomic number and usually its atomic weight
Explanation:
Please see the picture, I could really use some help!
Answers
Answer:
yo no se de eso preguntale a otro si
the substance that can not be further decomposed by ordinary chemical means is
A.water
B.gold
C.sugar
D.air
Answers
1) how can you make a solution more concentrated
Answers
Explanation:
solvent bc when you remove it it becomes more concentrate
What causes warm air to rise?
a. The fact that it's less dense than cold air.
b. The fact that it weighs more than cold air.
c. The fact that it has higher pressure than cold air.
d. The fact that it's more dense than cold air.
Answers
The answers are in the picture. this us the question, An increase in carbon dioxide production has led to an increase in global temperatures, which is causing glaciers to melt faster. If this trend continues, how will animals living in the polar regions be affected?
Answers
Answer:
D
Explanation:
because if there is no land for them they wont survive in only water
The increase in global temperature melts the ice in polar regions. This worsely affects the animals living there. Hence, they will migrate to other areas but this is in fact not possible for their adaptation in other areas and they may subject to extinction.
What is global warming ?Global warming is the rise of temperature of earth surface all over the world. The significant reason for global warming is green house effect. Gases like carbon dioxide, methane gas etc. are intensely absorbing temperature that is radiating back from earth.
Hence, these gases are increasing the atmospheric temperature in earth. Global warming have very serious impacts that going up to the major discussion to solve nowadays.
The melting of polar icebergs and rising of sea level definitely leads to the extinction of animals living in polar region. They cant be adopted to other regions and migrating to other areas does not save them. Hence, they will extinct from earth. Therefore, option d is correct.
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What is the name of Br6F10 ?
Answers
Answer:
Bromine fluoride
Which of the following is an example of an adaptation that might be useful in the grassland? HELP ME PLS
A. an insect looking like a tree branch
B. an animal having a heavy coat of fur
C. an animal having large feet so it can walk on the snow
D. an animal being the color of brown grass and dust
Answers
Answer:
D
Explanation:
In the grassland pretty warm so the heavy fur coat wouldn't help, there is no snow in the grassland so the big feet for walking on snow also wouldn't help, its the grassland where trees are more scarce so not A, but there is a lot of grass and dust so being able to blend in would help.
Answer:
D
Explanation:
AN animal this color can camouflage and it can help them so they will not be eaten by there predators
GUYS QUICK HELP!
is a soda pop bottle a invention or an innovation?
Answers
Answer:
Invention
Explanation:
!Hope This Helps!
2. The air pressure inside a submarine is 0.56 atm. What would be the pressure in
mmHg?
Answers
what is the formula mass of MgO (how much does one mole of it weigh)
Answers
Answer:
40.3044 g/mol
Explanation:
hope this helps
