Answer:calcium
Explanation: calcium is an alkaline earth metal,group 2 period 4
<span>(2) a diatomic molecule is the correct answer.
When two atoms of Br bond together, they will form bromine gas with a chemical formula of Br2. Therefore, it is called a diatomic molecule. (the word "di" means two).
Hope this helps~
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Iodine Strontium Silver...... ..I think.
Answer:
NaCl consists of one atom each of sodium and chlorine. Hence, each molecule of NaCl has 2 atoms total.
Explanation: