•common trends and similarities
•similar ions going down (ex: Mg+2 and Ca+2)
•same number of electron orbitals going across
Answer:
The Equator is an imaginary line perpendicular to this axis. It is equidistant from the North and South Poles, and divides the globe into the Northern Hemisphere and the Southern Hemisphere.
Answer:
33atoms
Explanation:
An atom is the smallest particle that can take part in a chemical reaction.
The given compound is:
3(NH₄)₂S
Here we have 3 moles of (NH₄)₂S ;
So:
Total number of atoms:
2 atoms of N
2 x 4 atoms of H
1 atom of S
Total = 2 + 8 + 1 = 11 atoms
So;
The total atom = 3 x 11 = 33atoms
your answer is <u>D</u><u>.</u><u> </u>physical change, because a new substance is not formed.