An element X has a valency of 2. Write the simplest formula for :
(a) bromide of the element
(b) oxide the element

An element X has a valancy of 2. write the simplest formula for bromide of the element.

Which element has a valency 1?

An element Z has valency of 3. Write down the formula of its oxide?

An element Z has a valency of 3. What is the formula of oxide of Z ?

An element has valency 3. Write the formula of its oxide.

An element X shows two valencies of 3 and 5. Work out the formulae of two oxides of this element.

An elements P has atomic no. 13. Write the formula of its oxide

(a) An element X exhibits variable valencies 3 and 5. Write the formulae of the chlorides of the element. (b) What is the ratio by mass of the elements present in the chemical formula of magnesium oxide

(a) The oxide of an element has the formula X_(2)O_(3). Write the formula of the phosphate of the same element. (b) Name the elements with complete K and L shells. Predict the valency of the element.