Filling of Electrons in Subshells

Q.

Which of the following statement is not correct about the periodic classification of elements?

1. The properties of the elements are the periodic functions of their atomic numbers.

2. Non-metallic elements are lesser in number the metallic elements.

3. The first ionization energies of the elements along a period do not vary in a regular manner with increase in atomic number.

4. For transition elements the d-sub shells are filled with electrons monotonically with increase in atomic number.

Q.

How are elements arranged in the long form of periodic table.

Q.

The group number and period of the chromium in the periodic table are, respectively:

1. $6\text{and}3$

2. $5\text{and}3$

3. $6\text{and}4$

4. $5\text{and}4$

Q. Which of the following ion has largest size?

1. $F^{-}$
2. $A{l}^{+3}$
3. $C{s}^{+}$
4. $O^{-2}$

Q. Transitional elements exhibit variable valences because they release $e^{-}$ from

1. ns & np orbitals
2. (n – 1)d & ns orbitals
3. (n – 1)d orbitals
4. ns orbital

Q. Which among the given elements does not has 10 electrons in their d-orbitals?

1. Zinc (Zn)
2. Mercury (Hg)
3. Silver (Ag)
4. Chromium (Cr)

Q. Match the elements with their valencies.

1. 1
2. 2
3. 3
4. \N

Q. Choose the correct pairs based on the maximum electrons that can be accomodated in that shell.

1. K - shell
2. L - shell
3. M - shell
4. N - shell
5. 8 electrons
6. 18 electrons
7. 2 electrons
8. 32 electrons

Q. Identify the elements with seven valence electrons.

1. Fluorine
2. Nitrogen
3. Phosphorus
4. Chlorine
5. Bromine
6. Calcium
7. Helium
8. Iodine
9. Astatine

Q.

Consider the following elements

Na, Ca, Al, K, Mg, Li

Which of these element belong to the same period of the periodic table?

Q. Why zinc is not transition metal even though it belongs to d orbital??

Q. Elements of which period, among the following, will not have f-subshell in its electronic configuration?

1. $5^{th}$ period elements
2. $4^{th}$ period elements
3. $3^{rd}$ period elements
4. $7^{th}$ period elements

Q. Write the name and symbol of the following elements:
The most reactive non-metal :__________

Q.

In modern periodic table, the atom of the element present at the end of each period has a/an _____ valence shell.

1. Incomplete

2. Half filled

3. Singly occupied

4. Completely filled

Q.

If an atom has electronic configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^2$ it will be placed in?

1. Second group

2. Third group

3. Fifth group

4. Sixth group

Q. Which among the following are the electronic configuration of noble gases?

1. 2
2. 2, 8, 1
3. 2, 8
4. 2, 8, 3
5. 2, 8, 8
6. 2, 8, 3, 4
7. 2, 8, 18, 8
8. 2, 8, 18, 18, 8

Q.

Which of the following statement is not correct about the periodic classification of elements?

1. The properties of elements are the periodic functions of their atomic numbers

2. Non-metallic elements are lesser in number than metallic elements

3. The first ionization energies along a period do not vary in a regular manner with increase in atomic number

4. For transition elements, the sub-shells are filled with electrons monotonically with increase in atomic number

Q. Which among the given elements does not has 10 electrons in their d-orbitals?

1. Zinc (Zn)
2. Mercury (Hg)
3. Silver (Ag)
4. Chromium (Cr)