counting elements and atoms\natoms\n•the smallest part of a chemical element\n•found on the periodic…

counting elements and atoms\natoms\n•the smallest part of a chemical element\n•found on the periodic table\n•combining atoms creates molecules.\nhow many atoms are in the molecule of an element?\nhow many atoms are in the molecule of a compound?

counting elements and atoms\natoms\n•the smallest part of a chemical element\n•found on the periodic table\n•combining atoms creates molecules.\nhow many atoms are in the molecule of an element?\nhow many atoms are in the molecule of a compound?

Answer

Answer:

The number of atoms in a molecule of an element can vary. For example, oxygen gas ($O_2$) has 2 atoms, ozone ($O_3$) has 3 atoms, and noble - gas elements like helium (He) are monatomic, so 1 atom. A molecule of a compound also has a variable number of atoms depending on the compound. For example, water ($H_2O$) has 3 atoms (2 hydrogen and 1 oxygen), carbon dioxide ($CO_2$) has 3 atoms (1 carbon and 2 oxygen).

Explanation:

Step1: Define element molecule

An element molecule is made of the same kind of atoms.

Step2: Give element molecule examples

$O_2$ has 2 atoms, $O_3$ has 3 atoms, He has 1 atom.

Step3: Define compound molecule

A compound molecule is made of different kinds of atoms.

Step4: Give compound molecule examples

$H_2O$ has 3 atoms, $CO_2$ has 3 atoms.