The period number in the long form of the periodic table is equal to :
1. | Magnetic quantum number of any element of the period. |
2. | Atomic number of any element of the period. |
3. | Maximum principal quantum number of any element of the period. |
4. | Maximum azimuthal quantum number of any element of the period. |
The elements in which electrons are progressively filled in 4f-orbitals are called:
1. | Actinoids | 2. | Transition elements |
3. | Lanthanoids | 4. | Halogens |
The outermost electronic configuration of the last element of the p-block in the 6th period is represented by:
1.
2.
3.
4.
The elements with atomic numbers 35, 53, and 85 are:
1. | Noble gases | 2. | Halogens |
3. | Heavy metals | 4. | Light metals |
Among the following, the elements that can show covalency greater than 4 is/are:
(a) Be
(b) P
(c) S
(d) B
Choose the correct option
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
Among the following sequences, the sequence contains atomic numbers of only representative elements is/are:
(a) | 3, 33, 53, 87 | (b) | 2, 10, 22, 36 |
(c) | 7, 17, 25, 37, 48 | (d) | 9, 35, 51, 88 |
Choose the correct option:
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
The properties among the following can be shown by the element belonging
to the 3rd period and group 13 of the periodic table:
(a) Good conductor of electricity
(b) Liquid, metallic
(c) Solid, metallic
(d) Solid, non-metallic
Choose the correct option :
1. (a), (c)
2. (b), (c)
3. (c), (d)
4. (b), (d)