The correct electronic configuration of an element that is just above the 4th period and belongs to the 16th group: |
1. | Si < Mg < Be < K | 2. | Be < Mg < Si < K |
3. | Si < Be < Mg < K | 4. | K < Mg < Si < Be |
Match the atomic numbers in List I with the corresponding groups in List II:
List-I (Atomic number) | List-II (Group) | ||
i. | 52 | P. | s |
ii. | 37 | Q. | p |
iii. | 65 | R. | f |
iv. | 74 | S. | d |
According to the periodic law of elements, the variation in properties of elements is related to their:
1. Atomic masses
2. Nuclear mass
3. Atomic numbers
4. Nuclear neutron-proton number ratio