Answer: Elements in the same family generally have similar properties because they contain the same number of the electrons, for instance.
Hope this helped!
Answer:

Explanation:
1. Calculate the moles of CoF₂ needed

2. Calculate the mass of CoF₂

Answer: Option (d) is the correct answer.
Explanation:
An orbital is defined as the energy shell which can contain a maximum of two electrons with opposite spins.
A wave like behavior of an electron is determined by an orbital and basically an orbital acts like a mathematical function.
For example, in a p-sub shell the orbitals present are
,
and
.
Therefore, we can conclude that orbitals are defined by energy level.
That’s the correct answer I believe ^