An element X of valency 3 conbines with another element Y of valency 2. What will be the formula of the compound formed ?

An element X has a valency of 4 whereas another element Y has a valency of 1. What will be the formula of the compound formed between X and Y ?

An element A has valencies equal to 3 and 5. It combines with another element B having valency equal to 2. What are formulae of the compounds thus formed ?

An element X has valency 3 while the element Y has valency 2. Write the formula of the compound berween X and Y

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

An element Y is in second period and group 16 of the periodic table: (i) Is it a metal or non -metal? (ii) What is the number of valence electrons in its atom? (iii) What is its valency? (iv) What is the name of the element? (v) What will be the formula of the compound formed by Y with sodium?

The two elements X and Y have 5 and 7 valence electron respectively, what will be the formula of the compound formed by them?

(i) Element 'Y' with atomic number 3 combines with element 'A' with atomic number 17. What would be the formula of the compound ? (ii) What is the electronic configuration of an element with atomic number 10 ? What will be its valency?

The valency of an element X is 1 and that of oxygen is 2. What will be the formula of the compound formed by the combination of element X with oxygen ?

The atomic number of an element A is 20 and that of another element B is 17. write down their electronic configuration. Will they produce an electrovalent compound or covalent compound? What will be their valencies? What will be the probable formula of the compound formed between them?