QBManager

Structure of Atom

9706 The atomic number of an element is $17$ . The number of orbitals containing electron pairs in its valence shell is

1

8

2

6

3

3

4

2

Explanation:

(c) Chlorine $C l_{17}$ $= [N e]$ 198-s55

Structure of Atom

9707 The atomic number of an element is $35$ and mass number is $81.$ The number of electrons in the outer most shell is

1

7

2

6

3

5

4

3

Explanation:

(a) Bromine consists of outer most electronic configuration $[A r] 3 d^{10} 4 s^{2} 4 p^{5}$ .

Structure of Atom

9708 Which of the following is not isoelectronic

1

N a^{+}

2

M g^{2 +}

3

O^{2 -}

4

C l^{-}

Explanation:

(d) $N a^{+}$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$M g + +$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$O^{2 -}$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$C l^{-}$ $= 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$

Structure of Atom

9709 The charge of an electron is $- 1.6 \times 10^{- 19} C .$ The value of free charge on $L i^{+}$ ion will be

1

3.6 \times 10^{- 19} C

2

1 \times 10^{- 19} C

3

1.6 \times 10^{- 19} C

4

2.6 \times 10^{- 19} C

Structure of Atom

9706 The atomic number of an element is $17$ . The number of orbitals containing electron pairs in its valence shell is

1

8

2

6

3

3

4

2

Explanation:

(c) Chlorine $C l_{17}$ $= [N e]$ 198-s55

Structure of Atom

9707 The atomic number of an element is $35$ and mass number is $81.$ The number of electrons in the outer most shell is

1

7

2

6

3

5

4

3

Explanation:

(a) Bromine consists of outer most electronic configuration $[A r] 3 d^{10} 4 s^{2} 4 p^{5}$ .

Structure of Atom

9708 Which of the following is not isoelectronic

1

N a^{+}

2

M g^{2 +}

3

O^{2 -}

4

C l^{-}

Explanation:

(d) $N a^{+}$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$M g + +$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$O^{2 -}$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$C l^{-}$ $= 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$

Structure of Atom

9709 The charge of an electron is $- 1.6 \times 10^{- 19} C .$ The value of free charge on $L i^{+}$ ion will be

1

3.6 \times 10^{- 19} C

2

1 \times 10^{- 19} C

3

1.6 \times 10^{- 19} C

4

2.6 \times 10^{- 19} C

Structure of Atom

9706 The atomic number of an element is $17$ . The number of orbitals containing electron pairs in its valence shell is

1

8

2

6

3

3

4

2

Explanation:

(c) Chlorine $C l_{17}$ $= [N e]$ 198-s55

Structure of Atom

9707 The atomic number of an element is $35$ and mass number is $81.$ The number of electrons in the outer most shell is

1

7

2

6

3

5

4

3

Explanation:

(a) Bromine consists of outer most electronic configuration $[A r] 3 d^{10} 4 s^{2} 4 p^{5}$ .

Structure of Atom

9708 Which of the following is not isoelectronic

1

N a^{+}

2

M g^{2 +}

3

O^{2 -}

4

C l^{-}

Explanation:

(d) $N a^{+}$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$M g + +$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$O^{2 -}$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$C l^{-}$ $= 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$

Structure of Atom

9709 The charge of an electron is $- 1.6 \times 10^{- 19} C .$ The value of free charge on $L i^{+}$ ion will be

1

3.6 \times 10^{- 19} C

2

1 \times 10^{- 19} C

3

1.6 \times 10^{- 19} C

4

2.6 \times 10^{- 19} C

Structure of Atom

9706 The atomic number of an element is $17$ . The number of orbitals containing electron pairs in its valence shell is

1

8

2

6

3

3

4

2

Explanation:

(c) Chlorine $C l_{17}$ $= [N e]$ 198-s55

Structure of Atom

9707 The atomic number of an element is $35$ and mass number is $81.$ The number of electrons in the outer most shell is

1

7

2

6

3

5

4

3

Explanation:

(a) Bromine consists of outer most electronic configuration $[A r] 3 d^{10} 4 s^{2} 4 p^{5}$ .

Structure of Atom

9708 Which of the following is not isoelectronic

1

N a^{+}

2

M g^{2 +}

3

O^{2 -}

4

C l^{-}

Explanation:

(d) $N a^{+}$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$M g + +$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$O^{2 -}$ $= 1 s^{2} 2 s^{2} 2 p^{6}$
$C l^{-}$ $= 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$

Structure of Atom

9709 The charge of an electron is $- 1.6 \times 10^{- 19} C .$ The value of free charge on $L i^{+}$ ion will be

1

3.6 \times 10^{- 19} C

2

1 \times 10^{- 19} C

3

1.6 \times 10^{- 19} C

4

2.6 \times 10^{- 19} C