Q32 of 203 Page 152

Which of the following represents a correct chemical formula?

according to the valencies of sodium(1) and nitrogen(3).

More from this chapter

All 203 →
30

Calculate the formula masses of the following compounds:

(i) Calcium chloride


(ii) Sodium carbonate


(Given: Atomic masses: Ca = 40 u; Cl = 35. 5 u; Na = 23 u; C = 12 u; O = 16 u)

 31

The atomic number of an element X is 13. What will be the number of electrons in its ion X3+?

 33

If the number of electrons in an ion Z3- is 10, the atomic number of element Z will be:

 34

The anion of an element has: