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Structure of Atom

238543 A dinegative ion of the element $X$ consists of 10 electrons and 8 neutrons. A dipositive ion of the element $Y$ consists of 12 protons. The number of neutrons in $Y$ is 1.5 times the number of electrons in atom $X$ . Then the mass numbers of $X$ and $Y$ would be in the ratio

1

1 : 2

2

2 : 3

3

3 : 2

4

2 : 5

5

1 : 3

Explanation:

| Proton | Neutron | Electrons |
|---|---|---|---|
| $^{2 -}$ | 8 | 8 | 10 |
| $^{2 +}$ | 12 | $1.5 8 = 12$ | 12 |
| ${M a s s o f}^{2 -}_{{M a s s o f}^{2 +}} =$ | $12 + 12 =$ | $24$ |
| $^{2 -} :^{2 +} = 16 : 24$ Or X $^{2 -} :^{2 +} = 2 : 3$ | |
|

Kerala CEE -03.07.2022

Structure of Atom

238544 The oxide which contains an odd electron at the nitrogen atom is

1

N_{2} O

2

{NO}_{2}

3

N_{2} O_{3}

4

N_{2} O_{5}

Explanation:

Exp:
Species | Total ele |
| $_{2}$ | 22 |
|---|---|
| $_{2}$ | 23 |
| $Double subscripts: use braces to clarify$ | 38 |
| $Double subscripts: use braces to clarify$ | 54 |
|
Hence, ${NO}_{2}$ contain an odd electron at the nitrogen atom is 23 .

JEE Main-26.06.2022

Structure of Atom

238547 The difference between number of Neutrons and Protons is positive for :

1 Hydrogen atom

2 Deuterium atom

3 Tritium atom

4 None of these

Explanation:

| Isotopes | $|$ | $l D i f f e r e n c e | | - - - | - - - | - - - | - - - | | (-)$ |
|Hydrogen $()$ | 0 | 1 | -1 |
|Deuterium | 1 | 1 | 0 |
|Tritium | 2 | 1 | 1 |
|
Hence, the difference between number of Neutrons and Protons is positive for tritium atom.

MPPET-2013

Structure of Atom

238549 Which one of the following is not an isolectronic pair ?

1

{Mg}^{2 +}, C^{4 -}

2

N^{3 -}, O^{2 -}

3

N^{2 -}, O^{2 -}

4

F^{-}, {Al}^{3 +}

Explanation:

Isoelectronic species have same number of electrons.
$\begin{aligned} N^{2 -} = 7 + 2 = 9 \\ O^{2 -} = 8 + 2 = 10 \end{aligned}$
$N^{2 -}$ and $O^{2 -}$ is not an isoelectronic species.

AP-EAMCET-2002

Structure of Atom

238550 Assertion (A) : Equal moles of different substances contain same number of constituent particles.
Reason (R) : Equal weights of different substances contain the same number of constituent particles.
The correct answer is :

1 Both (A) and (R) are true and (R) is the correct explanation of

(A)

2 Both (A) and (R) are true, but (R) is not the correct explanation of

(A)

3 (A) is true, but (R) is false

4 (A) is false, but (R) is true

AP-EAMCET-2007

Structure of Atom

238543 A dinegative ion of the element $X$ consists of 10 electrons and 8 neutrons. A dipositive ion of the element $Y$ consists of 12 protons. The number of neutrons in $Y$ is 1.5 times the number of electrons in atom $X$ . Then the mass numbers of $X$ and $Y$ would be in the ratio

1

1 : 2

2

2 : 3

3

3 : 2

4

2 : 5

5

1 : 3

Explanation:

| Proton | Neutron | Electrons |
|---|---|---|---|
| $^{2 -}$ | 8 | 8 | 10 |
| $^{2 +}$ | 12 | $1.5 8 = 12$ | 12 |
| ${M a s s o f}^{2 -}_{{M a s s o f}^{2 +}} =$ | $12 + 12 =$ | $24$ |
| $^{2 -} :^{2 +} = 16 : 24$ Or X $^{2 -} :^{2 +} = 2 : 3$ | |
|

Kerala CEE -03.07.2022

Structure of Atom

238544 The oxide which contains an odd electron at the nitrogen atom is

1

N_{2} O

2

{NO}_{2}

3

N_{2} O_{3}

4

N_{2} O_{5}

Explanation:

Exp:
Species | Total ele |
| $_{2}$ | 22 |
|---|---|
| $_{2}$ | 23 |
| $Double subscripts: use braces to clarify$ | 38 |
| $Double subscripts: use braces to clarify$ | 54 |
|
Hence, ${NO}_{2}$ contain an odd electron at the nitrogen atom is 23 .

JEE Main-26.06.2022

Structure of Atom

238547 The difference between number of Neutrons and Protons is positive for :

1 Hydrogen atom

2 Deuterium atom

3 Tritium atom

4 None of these

Explanation:

| Isotopes | $|$ | $l D i f f e r e n c e | | - - - | - - - | - - - | - - - | | (-)$ |
|Hydrogen $()$ | 0 | 1 | -1 |
|Deuterium | 1 | 1 | 0 |
|Tritium | 2 | 1 | 1 |
|
Hence, the difference between number of Neutrons and Protons is positive for tritium atom.

MPPET-2013

Structure of Atom

238549 Which one of the following is not an isolectronic pair ?

1

{Mg}^{2 +}, C^{4 -}

2

N^{3 -}, O^{2 -}

3

N^{2 -}, O^{2 -}

4

F^{-}, {Al}^{3 +}

Explanation:

Isoelectronic species have same number of electrons.
$\begin{aligned} N^{2 -} = 7 + 2 = 9 \\ O^{2 -} = 8 + 2 = 10 \end{aligned}$
$N^{2 -}$ and $O^{2 -}$ is not an isoelectronic species.

AP-EAMCET-2002

Structure of Atom

238550 Assertion (A) : Equal moles of different substances contain same number of constituent particles.
Reason (R) : Equal weights of different substances contain the same number of constituent particles.
The correct answer is :

1 Both (A) and (R) are true and (R) is the correct explanation of

(A)

2 Both (A) and (R) are true, but (R) is not the correct explanation of

(A)

3 (A) is true, but (R) is false

4 (A) is false, but (R) is true

AP-EAMCET-2007

Structure of Atom

238543 A dinegative ion of the element $X$ consists of 10 electrons and 8 neutrons. A dipositive ion of the element $Y$ consists of 12 protons. The number of neutrons in $Y$ is 1.5 times the number of electrons in atom $X$ . Then the mass numbers of $X$ and $Y$ would be in the ratio

1

1 : 2

2

2 : 3

3

3 : 2

4

2 : 5

5

1 : 3

Explanation:

| Proton | Neutron | Electrons |
|---|---|---|---|
| $^{2 -}$ | 8 | 8 | 10 |
| $^{2 +}$ | 12 | $1.5 8 = 12$ | 12 |
| ${M a s s o f}^{2 -}_{{M a s s o f}^{2 +}} =$ | $12 + 12 =$ | $24$ |
| $^{2 -} :^{2 +} = 16 : 24$ Or X $^{2 -} :^{2 +} = 2 : 3$ | |
|

Kerala CEE -03.07.2022

Structure of Atom

238544 The oxide which contains an odd electron at the nitrogen atom is

1

N_{2} O

2

{NO}_{2}

3

N_{2} O_{3}

4

N_{2} O_{5}

Explanation:

Exp:
Species | Total ele |
| $_{2}$ | 22 |
|---|---|
| $_{2}$ | 23 |
| $Double subscripts: use braces to clarify$ | 38 |
| $Double subscripts: use braces to clarify$ | 54 |
|
Hence, ${NO}_{2}$ contain an odd electron at the nitrogen atom is 23 .

JEE Main-26.06.2022

Structure of Atom

238547 The difference between number of Neutrons and Protons is positive for :

1 Hydrogen atom

2 Deuterium atom

3 Tritium atom

4 None of these

Explanation:

| Isotopes | $|$ | $l D i f f e r e n c e | | - - - | - - - | - - - | - - - | | (-)$ |
|Hydrogen $()$ | 0 | 1 | -1 |
|Deuterium | 1 | 1 | 0 |
|Tritium | 2 | 1 | 1 |
|
Hence, the difference between number of Neutrons and Protons is positive for tritium atom.

MPPET-2013

Structure of Atom

238549 Which one of the following is not an isolectronic pair ?

1

{Mg}^{2 +}, C^{4 -}

2

N^{3 -}, O^{2 -}

3

N^{2 -}, O^{2 -}

4

F^{-}, {Al}^{3 +}

Explanation:

Isoelectronic species have same number of electrons.
$\begin{aligned} N^{2 -} = 7 + 2 = 9 \\ O^{2 -} = 8 + 2 = 10 \end{aligned}$
$N^{2 -}$ and $O^{2 -}$ is not an isoelectronic species.

AP-EAMCET-2002

Structure of Atom

238550 Assertion (A) : Equal moles of different substances contain same number of constituent particles.
Reason (R) : Equal weights of different substances contain the same number of constituent particles.
The correct answer is :

1 Both (A) and (R) are true and (R) is the correct explanation of

(A)

2 Both (A) and (R) are true, but (R) is not the correct explanation of

(A)

3 (A) is true, but (R) is false

4 (A) is false, but (R) is true

AP-EAMCET-2007

Structure of Atom

238543 A dinegative ion of the element $X$ consists of 10 electrons and 8 neutrons. A dipositive ion of the element $Y$ consists of 12 protons. The number of neutrons in $Y$ is 1.5 times the number of electrons in atom $X$ . Then the mass numbers of $X$ and $Y$ would be in the ratio

1

1 : 2

2

2 : 3

3

3 : 2

4

2 : 5

5

1 : 3

Explanation:

| Proton | Neutron | Electrons |
|---|---|---|---|
| $^{2 -}$ | 8 | 8 | 10 |
| $^{2 +}$ | 12 | $1.5 8 = 12$ | 12 |
| ${M a s s o f}^{2 -}_{{M a s s o f}^{2 +}} =$ | $12 + 12 =$ | $24$ |
| $^{2 -} :^{2 +} = 16 : 24$ Or X $^{2 -} :^{2 +} = 2 : 3$ | |
|

Kerala CEE -03.07.2022

Structure of Atom

238544 The oxide which contains an odd electron at the nitrogen atom is

1

N_{2} O

2

{NO}_{2}

3

N_{2} O_{3}

4

N_{2} O_{5}

Explanation:

Exp:
Species | Total ele |
| $_{2}$ | 22 |
|---|---|
| $_{2}$ | 23 |
| $Double subscripts: use braces to clarify$ | 38 |
| $Double subscripts: use braces to clarify$ | 54 |
|
Hence, ${NO}_{2}$ contain an odd electron at the nitrogen atom is 23 .

JEE Main-26.06.2022

Structure of Atom

238547 The difference between number of Neutrons and Protons is positive for :

1 Hydrogen atom

2 Deuterium atom

3 Tritium atom

4 None of these

Explanation:

| Isotopes | $|$ | $l D i f f e r e n c e | | - - - | - - - | - - - | - - - | | (-)$ |
|Hydrogen $()$ | 0 | 1 | -1 |
|Deuterium | 1 | 1 | 0 |
|Tritium | 2 | 1 | 1 |
|
Hence, the difference between number of Neutrons and Protons is positive for tritium atom.

MPPET-2013

Structure of Atom

238549 Which one of the following is not an isolectronic pair ?

1

{Mg}^{2 +}, C^{4 -}

2

N^{3 -}, O^{2 -}

3

N^{2 -}, O^{2 -}

4

F^{-}, {Al}^{3 +}

Explanation:

Isoelectronic species have same number of electrons.
$\begin{aligned} N^{2 -} = 7 + 2 = 9 \\ O^{2 -} = 8 + 2 = 10 \end{aligned}$
$N^{2 -}$ and $O^{2 -}$ is not an isoelectronic species.

AP-EAMCET-2002

Structure of Atom

238550 Assertion (A) : Equal moles of different substances contain same number of constituent particles.
Reason (R) : Equal weights of different substances contain the same number of constituent particles.
The correct answer is :

1 Both (A) and (R) are true and (R) is the correct explanation of

(A)

2 Both (A) and (R) are true, but (R) is not the correct explanation of

(A)

3 (A) is true, but (R) is false

4 (A) is false, but (R) is true

AP-EAMCET-2007

Structure of Atom

238543 A dinegative ion of the element $X$ consists of 10 electrons and 8 neutrons. A dipositive ion of the element $Y$ consists of 12 protons. The number of neutrons in $Y$ is 1.5 times the number of electrons in atom $X$ . Then the mass numbers of $X$ and $Y$ would be in the ratio

1

1 : 2

2

2 : 3

3

3 : 2

4

2 : 5

5

1 : 3

Explanation:

| Proton | Neutron | Electrons |
|---|---|---|---|
| $^{2 -}$ | 8 | 8 | 10 |
| $^{2 +}$ | 12 | $1.5 8 = 12$ | 12 |
| ${M a s s o f}^{2 -}_{{M a s s o f}^{2 +}} =$ | $12 + 12 =$ | $24$ |
| $^{2 -} :^{2 +} = 16 : 24$ Or X $^{2 -} :^{2 +} = 2 : 3$ | |
|

Kerala CEE -03.07.2022

Structure of Atom

238544 The oxide which contains an odd electron at the nitrogen atom is

1

N_{2} O

2

{NO}_{2}

3

N_{2} O_{3}

4

N_{2} O_{5}

Explanation:

Exp:
Species | Total ele |
| $_{2}$ | 22 |
|---|---|
| $_{2}$ | 23 |
| $Double subscripts: use braces to clarify$ | 38 |
| $Double subscripts: use braces to clarify$ | 54 |
|
Hence, ${NO}_{2}$ contain an odd electron at the nitrogen atom is 23 .

JEE Main-26.06.2022

Structure of Atom

238547 The difference between number of Neutrons and Protons is positive for :

1 Hydrogen atom

2 Deuterium atom

3 Tritium atom

4 None of these

Explanation:

| Isotopes | $|$ | $l D i f f e r e n c e | | - - - | - - - | - - - | - - - | | (-)$ |
|Hydrogen $()$ | 0 | 1 | -1 |
|Deuterium | 1 | 1 | 0 |
|Tritium | 2 | 1 | 1 |
|
Hence, the difference between number of Neutrons and Protons is positive for tritium atom.

MPPET-2013

Structure of Atom

238549 Which one of the following is not an isolectronic pair ?

1

{Mg}^{2 +}, C^{4 -}

2

N^{3 -}, O^{2 -}

3

N^{2 -}, O^{2 -}

4

F^{-}, {Al}^{3 +}

Explanation:

Isoelectronic species have same number of electrons.
$\begin{aligned} N^{2 -} = 7 + 2 = 9 \\ O^{2 -} = 8 + 2 = 10 \end{aligned}$
$N^{2 -}$ and $O^{2 -}$ is not an isoelectronic species.

AP-EAMCET-2002

Structure of Atom

238550 Assertion (A) : Equal moles of different substances contain same number of constituent particles.
Reason (R) : Equal weights of different substances contain the same number of constituent particles.
The correct answer is :

1 Both (A) and (R) are true and (R) is the correct explanation of

(A)

2 Both (A) and (R) are true, but (R) is not the correct explanation of

(A)

3 (A) is true, but (R) is false

4 (A) is false, but (R) is true

AP-EAMCET-2007