Maximum Electrons

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum ${\text{2n}}^2$ electrons.

1. Assertion is correct but the reason is incorrect
2. Assertion is incorrect but the reason is correct
3. Both assertion and reason are correct but reason is not the correct explanation for the assertion
4. Both assertion and reason are correct and the reason is the correct explanation for the assertion

Q. What is the maximum number of electrons that the O-shell of an atom can accommodate?

1. 32
2. 64
3. 50
4. 18

Q. Which of the following elements have completely filled L- shell?

1. $\text{Ne}$
2. $\text{F}$
3. $\text{Be}$
4. $\text{Na}$

Q. What is the maximum number of electrons that the first two shells of an atom can occupy?

1. 8
2. 2
3. 18
4. 32

Q.

The number of electrons in a Lewis dot structure of each bonded atom should always sum up to:

1. 5

2. 7

3. 8 except hydrogen and helium

4. 2

Q.

The distribution of electrons in an orbit is obtained by ______.

1. n²

2. 2n²

3. n

4. 2n

Q. According to Dalton atomic theory, atoms are divisible particles and can be created in a chemical reaction.

1. True
2. False

Q. What is the maximum number of electrons that every shell can hold?

1. K= 2, L = 8, M = 18 and N = 32
2. K= 2, L = 4, M = 8 and N = 16
3. K= 2, L = 8, M = 8 and N = 8
4. K= 2, L = 8, M = 16 and N = 32

Q. Two element X and Y have following electronic configuration
$X1s^2;2s^2,2p^6;3s^2,3p^6;4s^2$
$Y1s^2;2s^2,2p^6;3s^2,3p^5$
The expected compound formed by combination of X and Y will be expressed as :

1. $X{Y}_2$
2. $X_2{Y}_5$
3. $X_5{Y}_2$
4. $X{Y}_5$

Q. How many electrons are there in the outermost shell of an oxygen atom?

1. 6
2. 8

3. Monoatomic

4. Diatomic

Q. The maximum number of electrons in a shell can be calculated by the formula _______.

1. $\text{n}$
2. $\text{2n}$
3. ${\text{2n}}^{\text{2}}$
4. ${\text{n}}^{\text{2}}$

Q.

The maximum number of electrons that can be accomodated in the L shell is:

1. 18

2. 32

3. 2

4. 8

Q. Which of the following elements have two electrons in its K shell?

1. Hydrogen
2. Helium
3. Sodium
4. Aluminium