1
Q
an atom is
A
The smallest part of an element that can exist.
2
Q
compound is
A
A substance formed by the chemical union of two or more elements.
3
Q
element is
A
A substance made of one type of atom only.
4
Q
molecule is
A
A collection of two or more atoms held together by chemical bonds.
5
Q
what statement about atoms and molecule are true
A
Elements and compounds can exist as molecules.
6
Q
Approximately how many elements are there?
A
There are approximately 100 elements listed on the periodic table.
