Their valency is one and both belong to the third period
Answer:
the answer for me is the third option (c)
Oil and water separate because they have different densities.
Answer:
The term "atom" is from the Greek word for 'indivisible',atoms are the smallest things in the matter that ould not be divided
Atoms consist of a nucleus made of protons and neutrons orbited by electrons.
Atoms are the basic units of matter and the defining structure of elements.