Periods

Q.

The number of elements in the 5th period is

1. 2

2. 8

3. 18

4. 32

Q. Electronic configuration of elements P, Q, R and S are given below:
P - (2, 2)
Q - (2, 8, 2)
R - (2, 8, 5)
S - (2, 5)
Which of the following options is correct?

1. P and Q belong to second period and R and S belong to third period.
2. P and R belong to second period and Q and S belong to third period.
3. S and Q belong to second period and R and P belong to third period.
4. P and S belong to second period and R and Q belong to third period.

Q.

Which alkaline earth metal has the largest atomic radius?

Q.

The highly metallic element has the configuration of 2, 8, 2.

1. True
2. False

Q.

Define D block elements in Modern Periodic Table.

Q.

The order of increasing atomic radius of Be, C, F, and Ne is: Ne < F < C < Be

1. True
2. False

Q.

Identify the position of an element that has a configuration 2, 8, 7 in the periodic table.

1. 1st group and 3rd period

2. 3rd group and 1st period

3. 1st group and 8th period

4. 17th group and 3rd period

Q. In case of R, S configuration the group having highest priority is?

1. $-N{O}_2$
2. $-N{H}_2$
3. $-CN$
4. $-OH$

Q. The number of electrons present in the valence shell of an atom with atomic number 38 is :

1. 2
2. 10
3. 1
4. 8

Q. Arrange the following elements in order of increasing valency:-
Aluminium, Sodium, Carbon, Nitrogen, Oxygen.

Q. Electronic configuration of elements P, Q, R and S are given below:​
P - (2, 2)​
Q - (2, 8, 2)​
R - (2, 8, 5)​
S - (2, 5)​
Which of the following options is correct?​ [1mark]
A. P and Q belong to second period and R and S belong to third period.
B. P and R belong to second period and Q and S belong to third period.​
C. S and Q belong to second period and R and P belong to third period.​
D. P and S belong to second period and R and Q belong to third period.​

Q.

what is a short period? How is it different from a normal period? How many short periods are there?