Question

Fill in the blanks.
1. An
cannot exist independently.
is the smallest unit of an element or a compound consisting of a group of
2. A
atoms.
3. A water molecule contains one atom of
and two atoms of
4. Atoms always combine in
to form a molecule.
5. When two or more atoms of different elements combine in a definite proportion by mass,
is formed.
a​

Answer 1

Answer:

1 . atom

2. ev of atom are O, H , C etc

3. atom of hydrogen and 2 atom oxygen

4. true

5. compound.