The Fundamental Unit Of Life

Question

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The atomic numbers of aluminium and chlorine are 13 and 17 respectively. How many electrons are present in Al⁺³ and Cl^- respectively?

Solution

Atomic no. of aluminium = 13

∴No. of protons in aluminium = 13

∴No. of electrons in aluminium = 13
Aluminium loses 3 electrons to give Al⁺³.

No. of electrons in Al⁺³ = 13 - 3 = 10
Thus,
Aluminium has 10 electron.

Similarly,

Atomic number of chlorine i=17
Chlorine gains one electron to give Cl^-
No. of electrons in Cl^- = 17 + 1 = 18.

Some More Questions From The Fundamental Unit of Life Chapter

If Z = 3, what would be the valency of the element? Also, name the element.

Composition of the nuclei of two atomic species X and Y are given as under

X Y
Protons = 6 6
Neutrons= 6 6

Give the mass numbers of X and Y. What is the relation between the two species?

For the following statements, write T for True and F for False.

(a) J.J. Thomson proposed that the nucleus of an atom contains only nucleons.

(b) A neutron is formed by an electron and a proton combining together. Therefore, it is neutral.

(c) The mass of an electron is about 1/2000 times that of proton.

(d) An isotope of iodine is used for making tincture iodine, which is used as a medicine.

Rutherford’s α-particle scattering experiment was responsible for the discovery of

Isotope of an element has

Number of valence electrons in Cl^- ion are

Which one of the following is a correct ? Electronic configuration of sodium

(a) 2, 8,2 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1.

Complete the following Table:

Atomic number

Mass number

Number of neutrons

Number of protons

Number of electrons

Name of the atomic species

9

-

10

-

-

-

16

32

-

-

-

Sulphur

-

24

-

12

-

-

-

2

-

1

-

-

-

1

-

1

0

-

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The Fundamental Unit Of Life

The atomic numbers of aluminium and chlorine are 13 and 17 respectively. How many electrons are present in Al⁺³ and Cl^- respectively?

Some More Questions From The Fundamental Unit of Life Chapter

If Z = 3, what would be the valency of the element? Also, name the element.

Composition of the nuclei of two atomic species X and Y are given as under

X Y
Protons = 6 6
Neutrons= 6 6

Give the mass numbers of X and Y. What is the relation between the two species?

Rutherford’s α-particle scattering experiment was responsible for the discovery of

Isotope of an element has

Number of valence electrons in Cl^- ion are

Which one of the following is a correct ? Electronic configuration of sodium

(a) 2, 8,2 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1.

Complete the following Table:

Atomic number

Mass number

Number of neutrons

Number of protons

Number of electrons

Name of the atomic species

9

-

10

-

-

-

16

32

-

-

-

Sulphur

-

24

-

12

-

-

-

2

-

1

-

-

-

1

-

1

0

-

How do you establish that matter is electrical in nature?

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Loaction

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the atomic species
9	-	10	-	-	-
16	32	-	-	-	Sulphur
-	24	-	12	-	-
-	2	-	1	-	-
-	1	-	1	0	-

For Daily Free Study Material Join wiredfaculty

The Fundamental Unit Of Life

The atomic numbers of aluminium and chlorine are 13 and 17 respectively. How many electrons are present in Al+3 and Cl- respectively?

Some More Questions From The Fundamental Unit of Life Chapter

If Z = 3, what would be the valency of the element? Also, name the element.

Composition of the nuclei of two atomic species X and Y are given as under X Y Protons = 6 6 Neutrons= 6 6Give the mass numbers of X and Y. What is the relation between the two species?

Rutherford’s α-particle scattering experiment was responsible for the discovery of

Isotope of an element has

Number of valence electrons in Cl- ion are

Which one of the following is a correct ? Electronic configuration of sodium (a) 2, 8,2 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1.

Complete the following Table: Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the atomic species 9 - 10 - - - 16 32 - - - Sulphur - 24 - 12 - - - 2 - 1 - - - 1 - 1 0 -

How do you establish that matter is electrical in nature?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

The atomic numbers of aluminium and chlorine are 13 and 17 respectively. How many electrons are present in Al⁺³ and Cl^- respectively?

Composition of the nuclei of two atomic species X and Y are given as under

X Y
Protons = 6 6
Neutrons= 6 6

Give the mass numbers of X and Y. What is the relation between the two species?

Number of valence electrons in Cl^- ion are

Which one of the following is a correct ? Electronic configuration of sodium

(a) 2, 8,2 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1.

Complete the following Table:

Atomic number

Mass number

Number of neutrons

Number of protons

Number of electrons

Name of the atomic species

9

-

10

-

-

-

16

32

-

-

-

Sulphur

-

24

-

12

-

-

-

2

-

1

-

-

-

1

-

1

0

-