Atomic mass number

the sum of its protons and neutrons

atomic mass number

The total number of protons and neutrons in the nucleus of an atom, which determines the atom's mass and isotope identity.

atomic number

The number of protons in the nucleus of an atom, defining the element and its position on the periodic table.

atoms

The smallest units of matter, composed of protons, neutrons, and electrons, which define the chemical elements.

chemical reaction

A process where substances undergo chemical changes to transform into different substances, involving the breaking and forming of bonds.

covalent bond

A type of chemical bond formed when two atoms share one or more pairs of electrons, resulting in a stable balance of attractive and repulsive forces.

electrolytes

Substances that dissociate into ions when dissolved in water, allowing the solution to conduct electricity.

electrons

Negatively charged subatomic particles that orbit the nucleus of an atom and are involved in chemical bonding.

ionic bond

A type of chemical bond formed when one atom donates one or more electrons to another atom, resulting in electrostatic attraction between the positively and negatively charged ions.

ions

Atoms or molecules that have gained or lost one or more electrons, resulting in a net electrical charge.

isotopes

law of definite proportions