Topic 2 - Chemical Bonding And Structure

Question 1

Metallic bonding

Answer 1

The electrostatic force of attraction between the nuclei of metal cations and delocalised electrons

Question 2

Covalent bond

Answer 2

A bond formed between two atoms when an atomic orbital containing a single electron from one atom overlaps with an atomic orbital also containing a single electron, of another atom

Question 3

Ionic bonding

Answer 3

A regular array of oppositely charged ions - strong electrostatic attractions between the ions between the ions - arranged in such a way that the electrostatic attraction between oppositely charged ions overcomes the repulsions between ions with the same charge

Question 4

Bond length

Answer 4

The distance between nuclei of the two atoms that are covalently bonded together

Question 5

Electronegativity

Answer 5

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

Question 6

Polar covalent bond

Answer 6

A type of covalent bond between two atoms where the bonding electrons are unequally distributed. Because of this, one atom carries a slight negative charge and the other a slight positive charge

Question 7

Discrete (simple) molecule

Answer 7

An electrically neutral group of two or more atoms held together by chemical bonds

Question 8

Displayed formula

Answer 8

Shows each bonding bait as a line drawn between the two atoms involved e.g. H-O-H

Question 9

Dipole

Answer 9

When two charges of equal magnitude but opposite signs are separated by a small distance

Question 10

Hydrogen bond

Answer 10

An intermolecular interaction between a hydrogen atom of a molecule bonded to an atom which is more electronegative than hydrogen and another atom in the same or a different molecule

Question 11

Delocalised electrons

Answer 11

Electrons that are not associated with any single atom or any single covalent bond