Chemistry 3.1 - Keywords

Question 1

Define periodicity

Answer 1

Trends that occur (in physical and chemical properties) as you move across the periodic table

Question 2

Define atomic radius

Answer 2

The distance of the furthermost electron from the nucleus

Question 3

What is meant by electronegativity

Answer 3

The ability of an atom to attract a pair of electrons in a covalent bond to itself

Question 4

What is meant by electrical conductivity?

Answer 4

The degree to which a specified material can conduct electricity

Question 5

What is meant by Melting / boiling point?

Answer 5

A measure of the energy required to separate the particles in a substance

Question 6

What is meant by metallic bonding?

Answer 6

The strong electrostatic attraction between cations (positive ions) and delocalised electrons

Question 7

Define first ionisation energy

Answer 7

The energy required to remove an electron from each atom in one mole of gaseous atoms
M(g) → M+ (g) + e-

Question 8

Define nuclear charge

Answer 8

The charge due to protons in the nucleus (How positive or negative an atom/ion is)

Question 9

Define shielding

Answer 9

The repulsion of outer shell electrons by inner shell electrons

Question 10

Define electron configuration

Answer 10

The way electrons are distributed in shells and subshells around the positive nucleus