Covalent bonding

Question 1

Covalent bonding occurs between two non-metals
A covalent bond involves the

Answer 1

electrostatic attraction between nuclei of two atoms and the bonding electrons of their outer shells

Question 2

single

double

triple covalent bonds

how many electrons shared

Answer 2

2

4

6

Question 3

Single covalent bonding

Answer 3

A single covalent bond can be defined as a chemical bond in which two atoms share two electrons to form one bond.

e.g h2

Question 5

In some instances, the central atom of a covalently bonded molecule can accommodate more or less than 8 electrons in its outer shell

Being able to accommodate more than 8 electrons in the outer shell is known as

Answer 5

‘expanding the octet rule’
Accommodating less than 8 electrons in the outer shell means than the central atom is ‘electron deficient’
Some examples of this occurring can be seen with period 3 elements

Question 6

The superscript number tells you how many electrons are in that orbital. 1s^2 means 2 electrons are in the 1s orbital

Question 7

octet cant happen with what elements

Answer 7

periods 1 or 2