covalent compounds

Question 1

when are they formed

Answer 1

Formed by two or more different kinds of non-metal atoms, chemically bonded together. Molecule formed as no charge (neutral)

Question 2

to name a covalent bond..

Answer 2

1. Full name of first element + second element named as though it is a negative ion e.g. ending in -ide
2. Add prefixes to show the number of atoms of each element present
3. if first element is singular no mono prefix is needed
4. To avoid awkward pronunciation, the final oh or a of the prefix is often dropped when the element name begins with a vowel

Question 3

do elements exist in molecular form?

Answer 3

When an element exists in molecule form, it is not considered a compound and so covalent compound naming rules don’t apply. We name them as we would the pure element.

Question 4

which elements exist in molecular form

Answer 4

O2 Oxygen
H2 Hydrogen
Cl2 Chlorine
N2 Nitrogen
H2O Water
CH4 Methane
NH3 Ammonia
C6H12O6 Glucose
(all numbers written are for subscript)

Question 5

oxygen

Answer 5

O2 Oxygen

Question 6

hydrogen

Answer 6

H2 Hydrogen

Question 7

chlorine

Answer 7

Cl2 Chlorine (CL2)

Question 8

nitrogen

Answer 8

N2 Nitrogen

Question 9

water

Answer 9

H2O Water

Question 10

methane

Answer 10

CH4 Methane

Question 11

ammonia

Answer 11

NH3 Ammonia