Topic 2 - Bonding And Structure Flashcards Preview

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Flashcards in Topic 2 - Bonding And Structure Deck (14):
1

What is ionic bonding

The electrostatic attraction between oppositely charged ions

2

What is meant by the term covalent bond

The electrostatic force of attraction between two nuclei and a shared pair of electrons between them

3

What is meant by the term dative bond

The electrostatic force of attraction of two nuclei for a shared pair of electrons, both of the pair coming from one of the atoms forming the bond

4

Which is negative - the cathode or the anode

The cathode

5

Which two types of ions make up a covalent bond

A metal and a non metal

6

What are allotropes

Different forms of the same element that exist in the same physical state

7

What is electronegativity

A numerical measure of the power of an atom to attract a pair of electrons in a covalent bond in a molecule

8

What is the most electronegative element

Fluorine

9

What is the least electronegative element

Francium

10

What does polarising power depend on

The size and the charge of the cation (+) - small size, high charge = more polarising

11

What does polarisability depend on

The size on the anion (-) - large anion = more polarisable

12

What is covalent character

How covalent the bonds are - the greater the degree of polarisability, the more covalent character

13

What are the 4 types of intermolecular forces

Permanent dipole - permanent dipole, permanent dipole - induced dipole, London dispersion forces (instantaneous dipole - induced dipole) and hydrogen bonds

14

What is a hydrogen bond

The electrostatic force of attraction between the poorly shielded proton of a hydrogen atom bonded to a small highly electronegative atom such as nitrogen, oxygen or fluorine, and a lone pair of electrons on a N, O or F atom on a neighbouring molecule