An element X has atomic number 19.What will be the formula of its oxide?

An element 'P' has atomic number 56. What will be the formula of its halide?

An element 'P' has atomic number 56. What will be the formula of its halide?

(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?

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

An element has atomic number 34. Its valency will be

The element with atomic numbers 19 is