The Fundamental Unit Of Life

Question

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A student weighs 30 kg. Suppose his entire body is made up of electrons. How many electrons are there in his body? Compare the total number of electrons in his body with the population of India.

Solution

Mass of electron = 9.1 x 10^-31kg.

Number of electron in the body of student= total mass/ mass of each electrons=30kg/9.1 x 10^-31 kg

Therefore,

The student is made up of approximately 3.29 x10³¹ electrons.

Population of India is about 100 crores

3.29 x 10³¹/10⁹ =3.29 x 10²²

Therefore,

Number of electrons in the body of the student is 3.29 x 10²² times the population of India.

Some More Questions From The Fundamental Unit of Life Chapter

Na⁺ has completely filled K and L-shells. Explain.

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

A student weighs 30 kg. Suppose his entire body is made up of electrons. How many electrons are there in his body? Compare the total number of electrons in his body with the population of India.

Some More Questions From The Fundamental Unit of Life Chapter

Na⁺ has completely filled K and L-shells. Explain.

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

-

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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Email Address

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

A student weighs 30 kg. Suppose his entire body is made up of electrons. How many electrons are there in his body? Compare the total number of electrons in his body with the population of India.

Some More Questions From The Fundamental Unit of Life Chapter

Na+ has completely filled K and L-shells. Explain.

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 -

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Na⁺ has completely filled K and L-shells. Explain.

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

-