Periods

Q. The atom having the valence shell electronic configuration $4s^{2}4p^2$ would be in

1. group 14 or IV A and period 3

2. group 14 or IV A and period 4

3. group 2 or II A and period 3

4. group 12 or II B and period 4

Q.

An element, the atomic number 36 belongs to _______ group and -------- period.

Q. Element with the electronic configuration as $[Ar{]}^{18}3d^{5}4s^1$ is placed in

1. IA, s-block

2. VIA, s-block

3. VIB, s-block

4. VIB, d-block

Q. Write the general outer electronic configuration of $s,p,d$ and $f$ block elements.

Q. Element with the electronic configuration as $[Ar{]}^{18}3d^{5}4s^1$ is placed in?

1. IA, s-block
2. VIA, s-block
3. VIB, s-block
4. VIB, d-block

Q. Which is true about effective nuclear charge?

1. Z_eff increases as we move from left to right in the Periodic table

2. Z_eff decreases from top to bottom

3. Z_eff increases from top to bottom

4. Z_eff ⁼ Z- σ (Screening Constant)

Q. Number of valence electrons present in 3.2 g of S–2 ion will be Options: 0.6 × NA Should have chosen 0.8 × NA 1.2 × NA Wrong 1.6 × NA

Q. Elements with high electronegativity are generally

1. Good oxidants
2. Good reductants
3. Hard solids
4. Soft solids

Q. In the modern periodic table, the value of quantum number is indicated by the period.

1. Azimuthal
2. Spin
3. Principle
4. Magnetic

Q. 45. If in periodic table 10th periods are considered then number of subshell present in 9th period will be A)6 B)7 C)5 D)8

Q. Is e/m ratio same for neutron and gamma rays?

Q. An element has an atomic number of 107. What is its electronic configuration and what will be its group number?

1. $\left[Rn\right]5f^{14}6d^{1}7s^{2}7p^4$, group 3
2. $\left[Rn\right]5f^{14}6d^{5}7s^2$, group 7
3. $\left[Rn\right]5f^{14}7s^{2}7p^5$, group 7
4. $\left[Rn\right]5f^{14}6d^{2}7s^{2}7p^3$, group 15

Q. 2 If the magnetic quantum number of an atom is represented by -3 then the principal quantum number will be?

Q.

In the modern periodic table, the period indicates the value of:

(a) Atomic number

(b) Atomic mass

(c) Principal quantum number

(d) Azimuthal quantum number.

Q. Element with the electronic configuration as $[Ar{]}^{18}3d^{5}4s^1$ is placed in?

1. IA, s-block
2. VIA, s-block
3. VIB, s-block
4. VIB, d-block

Q. Spatial orientation of the orbital with respect to standard set of coordinate axis meaning in magnetic quantum number

Q. what is the liquification order in noble gases ? explain how helium is harder to liquify then any other noble gases

Q. An atom has 2 electrons in the first (K)shell, 8 electrons in the second (L) shell and 2 electrons in the third (M) shell. Give its electronic configuration and find out the following:-
1.Atomic number
2.Total number of principal quantum numbers
3.Total number of sub-levels
4.Total number of s-orbitals
5.Total number of p-electrons

Q. how cmany electrons can have following quantum numbers ?
n=3 and l =2 and magnetic quantum no is 0 how is the answer 2 can anybody explain the reason ?

Q.

In the modern periodic table, the period indicates the value of:

(a) Atomic number

(b) Atomic mass

(c) Principal quantum number

(d) Azimuthal quantum number.

Q. Atomic number of Ag is 47. In the same group the atomic number of elements placed above and below Ag will be

1. 37, 67
2. 29, 79
3. 39, 69
4. 18, 28

Q. The atom having the valence shell electronic configuration $4s^{2}4p^2$ would be in?

1. Group 2 or II A and period 3
2. Group 12 or II-B and period 4
3. Group 14 or IV-A and period 4
4. Group 14 or IV-A and period 3

Q. Write configuration of Zn(z=30)and Ti(z=30) and Ti²⁺(z=22)give no. of electrons having s= 0, p electrons , shells , subshells and orbitals used.

Q.

Which quantum number determines the radius of an atom?

1. n and l

2. m

3. l

4. n