Answer:
<u>Deposition</u>
this is the process of a substance changing its state from gas to solid. Solid to gas is known as sublimation
Answer:
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Explanation:
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Answer:
16,,24Mg 17,,a24.1 18a mass number of the most abundant isotope
Explanation:
atomic number of Mg is 12 ,therefore its mass number should be the value that is very close to 24.
24.1 is the value of thee most abundant isotope.
Positive ions are positive because they have lost electrons.
(A)-This sounds accurate, but is actually not true. When an atom loses an electron and forms a positive ion, there will be less negative charge from the electrons to attract the positively charged nucleus. Losing electrons will actually decrease the attraction between the electrons and the nucleus.
(B)-This is true in some cases, but not all. If, for example, sodium were to lose an electron, it would drop down to having its largest orbital being in the second energy level, and would decrease in size. If magnesium were to lose an electron, it would still have one electron in the third energy level, so it wouldn't drop down an energy level.
(C) and (D)-Not sure where these answers even came from.
The actual reason behind the radius of a positive ion being smaller than the radius of its neutral atom is that the repulsive force between the electrons themselves is decreased, causing them to move closer together.
Answer: Option (d) is the correct answer.
Explanation:
Properties that are unable to bring any change in chemical composition of a substance are known as physical properties.
For example, size, shape, volume, density, boiling point, melting point etc is a physical property.
Whereas properties that bring change in chemical composition of a substance are known as chemical properties.
For example, combustion, toxicity, reactivity etc are all chemical properties.
Thus, we can conclude that a physical property is a property the sample displays without changing its composition.
