Atomic Structure

Question 1

Atomic number

Answer 1

number of protons in an atom of an element

Question 2

mass number

Answer 2

number of protons and neutrons in the nucleus of an atom

Question 3

Nucleons

Answer 3

protons and nucleons collectively in the nucleus

Question 4

Relative atomic mass

Answer 4

mass if a particle on a scale where an atom of carbon-12 has a mass of 12 units

Question 5

Isotopes

Answer 5

Atoms of the same element having the same number of protons, but different number of neutrons

Question 6

Electron configuration

Answer 6

The arrangement of electrons in an atom, molecule or other physical structure

Question 7

Aufbau principle

Answer 7

This states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels