Atoms MCQs with Answers

One-liner

An atom contains 3 fundamental subatomic particles: protons, neutrons, and electrons.

One-liner

The smallest unit of matter is the atom, which retains the chemical properties of an element.

One-liner

The statement is known as the Pauli exclusion principle, which states that no two electrons in an atom can have the identical set of all four quantum numbers.

One-liner

The symbol of element B with five protons and six neutrons is ¹¹B, where the mass number (protons + neutrons) is written as a superscript.

One-liner

Orbital electrons have specific (quantized) amount of energy, meaning they can only occupy discrete energy levels.

One-liner

The relative atomic mass of a neutron is 1.0087 atomic mass units (amu).

One-liner

Silver (Ag) with atomic number 47 has 1 valence electron in its outermost shell.

One-liner

Orbitals having the same energy are called degenerate orbitals.

One-liner

Atomic number 28 corresponds to Nickel (Ni), which has 2 unpaired electrons in its 3d subshell.

One-liner

The discovery of neutron became very late because it does not carry any charge, making it electrically neutral and undetectable by methods used for charged particles.