Deriving Information About an Element From a Periodic Table

Q. Atoms having the same mass number but different atomic number are called:

1. Isotopes
2. Isobars
3. Isotones
4. Isomers

Q.

Which of the following is the chemical symbol for iron?

1. Cu

2. Fe

3. Zn

4. Na

Q. Does a symbol represent an atom or a moleculesName an element whose atoms occur in pair