Structure of Atom Test

Result

Structure of Atom Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

The minimum number of orbitals possible for a shell containing g-subshell is

A
25

B
49

C
9

D
16

Solution

For g -subshell, l = 4. Hence, n = 5 (minimum)

Number of orbitals in 5^th shell = n² = 5²=25
Question 2
1 / -0

The number of concentric spherical surfaces for 3s orbital at which the probability of finding the electron is zero, are

A
2

B
0

C
1

D
3

Solution

Number of nodal surfaces = n - l - 1 = 3 - 0 - 1 = 2
Question 3
1 / -0

M⁺ ion is isoelectronic with argon and has Z + 1 neutrons ( Z = atomic number of M⁺ ). The mass number of the element M will therefore be

A
13

B
40

C
39

D
35

Solution

Atomic number Z of M = 18 (atomic number of Ar) + 1 = 19

Number of neutrons = 19 + 1 = 20;

mass number = p + n = 39
Question 4
1 / -0

If m_p is the mass of proton, m_n that of a neutron, M₁ that of .₁₀Ne²⁰ nucleus and M₂ that of .₂₀Ca⁴⁰ nucleus, then which of the following relations is/are not true?

A
M₂ = 2M₁

B
M₂ < 2M₁

C
M₂ > 2M₁

D
M₂<20 (m_p+m_n)

Solution

There is some mass defect due to binding energy.