Answer:
An atom of Bromine (Br) forms an ion and becomes Br⁻
Explanation:
- Atoms of elements gain or lose electron(s) to attain a stable configuration and form ions.
- When an atom gains electron(s) it forms a negatively charged ion called an anion.
- For example, Bromine is a halogen and its atom requires to gain one electron to attain stability and form a bromine ion (Br⁻).
- When an atom loses electron(s) it forms a positively charged ion called a cation.
- For instance, atoms of calcium(Ca) requires to lose two electrons to attain stability and form calcium ion (Ca²⁺).
The number of molecules of gases in each of the 3 vessels is the same.
<h3>Number of moles</h3>
The first vessel contains 2g of
gas:
Number of molecules in 2 g = 2/2 = 1 mole
The second vessel contains 32 g of
gas:
Number of molecules = 32/32 = 1 mole
The third vessel contains 44 g of
gas:
Number of molecules = 44/44 = 1 mole
Thus, the 3 vessels contain the same number of moles of gases.
More on the number of moles can be found here: brainly.com/question/12513822
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Yes it is a chemical change because it is changing color which shows a chemical change, plus it changes into another element