Chemistry revision. Unit C3

What is meant by the term ‘Valency’?

Valency is defined as the combining power of an element.

GIve the 3 elements with valency 0 and its symbol

• Argon, Ar

• Helium, He

• Neon, Ne

Give the 8 elements with valency 1 And its symbol

• Bromine, Br

• Chlorine, Cl

• Iodine, I

• Fluorine, F

• Hydrogen, H

• Pottasium, K

• Sodium, Na

• Silver, Ag

Give the 5 elements with the valency 2 and its symbol

• Calcium, Ca

• Magnesium, Mg

• Barium, Ba

• Oxygen, O

• Zinc, Zn

Give the element with valency 1 or 3 And its symbol

Gold, Au

Give the element with valency 2 or 3 And its symbol

Iron, Fe

Give the elements with the valency 2 or 4 and its symbol

• Carbon, C

• Tin, Sn

• Lead, Pb

Give the elements with valency 3 and their symbols

• Aluminium, Al

• Nitrogen, N

Give the 2 elements with valency 1 or 2 and their symbols

• Copper, Cu

• Mercury, Hg

Give the element with valency 2,4 or 6 and its symbol

• Sulfur,

GIve the element with valency 3 or 5 and its symbol

Phosphorus, P