Atoms Quiz

An atom is the smallest unit of an element that still retains the chemical properties of that element. It consists of protons, neutrons, and electrons.

A proton has a positive charge, which balances the negative charge of an electron in a neutral atom.

The atomic number is defined by the number of protons in the nucleus of an atom, which is unique to each element.

When atoms gain or lose electrons, they become ions. A loss of electrons results in a positive ion, while a gain creates a negative ion.

The mass number of an atom is the sum of its protons and neutrons, which are found in the nucleus.

Covalent bonding occurs when atoms share electrons to achieve stable electron configurations.

Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons.

Electrons, especially those in the outer shell (valence electrons), are involved in forming chemical bonds.

Hydrogen has one proton and is the simplest and lightest of all elements.

A cation has more protons than electrons and carries a positive charge.