An atom in the ground state contains three electrons in its outermost principal energy level. This is an atom of an element found in Group A) 1 B) 5 C) 13 D) 3

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .

it's c. elements are placed in rows based on how may valencies electrons have.

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements