1. The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is:

2. The element with atomic number 35 belongs to

3. The correct order of first ionization potential among following elements, Be, B, C, N and O is

4. Representative elements are those which belong to

5. Which of the following properties generally decreases along a period?

6. On the Paulings electronegativity scale the element next to F is

7. The group number, number of valence electrons, and valency of an element with the atomic number 15, respectively, are:

8. Which of the following oxides is amphoteric in character?

9. In the modern periodic table, the period indicates the value of:

10. In the long form of the periodic table, the valence shell electronic configuration of 5s²5p