Definition T2

Question 1

Atomic number / Proton number

Answer 1

Number of proton in nucleus

Question 2

Nucleon number

Answer 2

Number of proton and neutron in nucleus

Question 3

Isotopes

Answer 3

Atoms of same element with the same number of proton but different number of neutrons.

Question 4

Isoelectronic

Answer 4

Ions with same number of electron

Question 5

Orbitals

Answer 5

Space around the nucleus where the probability of finding electron is the greatest

Question 6

Degenerate

Answer 6

Same energy level

Question 7

Ground state

Answer 7

An atom is in the ground state when the electron are in the orbitals of lowest available energy

Question 8

Free radical

Answer 8

Atoms or groups of atoms which have a single unpaired electron.

Question 9

First Ionisation Energy

Answer 9

Energy needed to remove one mole of electron from one mole of gaseous atom to form one mole of gaseous ion with a charge of 1+

Question 10

Second Ionisation Energy

Answer 10

Energy needed to remove one mole of electron from one mole of gaseous ion with a charge of 1+ to form one molecule of gaseous ion with a charge of 2+