Electronic configuration

Q.

How many electrons are there in a neutral atom of Lithium?

1. 2

2. 4

3. 3

4. 8

Q. Identify element X from the following options if it has 3 electrons in its M-shell.

1. Aluminium
2. Boron
3. Magnesium
4. Lithium

Q.

Name in the following:

The arrangement of electrons in different shells around the nucleus.

Q.

The number of electrons in the outermost shell in the atom of an inert element is:

1. $0$

2. $1$

3. $2$

4. $8$

Q. Which of the following elements will have at least 5 electrons in its L-shell?

1. Boron
2. Fluorine
3. Carbon
4. Magnesium

Q. Among the following, which element has the same number of electrons present in both K-shell and M-shell?

1. Helium
2. Beryllium
3. Magnesium
4. Carbon

Q.

Which of these is/are transition metals?

Atomic numbers of X, Y, and Z are 30, 40, and 50 respectively.

1. ‘X’ only

2. ‘X’ and ‘Z’

3. ‘X’ and ‘Y’

4. ‘Y’ and ‘Z’