Question

Choose the correct statement(s) and correct the false statement(s).

Options

• Elements are made up of molecules and compounds are made up of atoms.

• The molecule of a compound is always made up of two or more atoms of the same kind.

• One molecule of nitrogen gas contains three nitrogen atoms.

• Water is made of two hydrogen atoms, covalently bonded with one oxygen atom.

Answer 1

Water is made of two hydrogen atoms, covalently bonded with one oxygen atom.

Corrections:

1. elements exist as atoms or molecules, while compounds are made of molecules or ions.
2. a compound molecule is made of atoms of different elements, whereas molecules of elements contain the same kind of atoms.
3. one molecule of nitrogen gas, N₂, contains two nitrogen atoms.