A metal X is in the first group of the periodic table. What will be the formula of its oxide?

Open in App

Solution

The elements in the first group of the periodic table have a valency of 1. As the metal X is in the first group, its valency is 1. We know that the valency of oxygen is 2 because it needs two electrons to complete its outer shell of 8. From this, we can conclude that two atoms of metal X will combine with one atom of oxygen to form an oxide $X_{2} O$ . Therefore, the formula of the oxide of metal X is $X_{2} O$ .

Suggest Corrections

Similar questions

An element X is in group 2 of the periodic table :

(a) What will be the formula of its chloride?

(b) What will be the formula of its oxide?

Which among the following is not true about modern periodic table (a) group number of an element gives an idea of the numbers of its valence electrons (b) non metals are present towards the right side of the periodic table (c) hydrides of the elements in the first group will have a similar formula (d) oxides of elements in the first period will have a similar formula

Q. Aluminium is placed in the group 3A of periodic table. Hence the formula of its oxide is:

Element A is in the $1^{s t}$ group of the Modern Periodic Table. The formula of its ion will be :

Q. (a) A metal M forms an oxide having the formula M₂O₃. It belongs to 3rd period in the modern periodic table. Write the atomic number and valency of the metal.
(b) Write the formula of chloride of metal M.
(c) What could metal M be?

Join BYJU'S Learning Program