Question

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Answer 1

17) B) The mass of an electron is equal to mass of a neutron.

Explanation-

The mass of electron is 200 times smaller than the mass of neutron

The mass of electron is ⬇

$9.10939× {10}^{ - 31} kg</p><p>$

kg and that of neutron is ⬇

$1.67493× {10}^{ - 27} kg.$

18) I would like to explain...

According to Thomson model of an atom:

1. An atom has spherical shape with radius ≈

${10}^{ - 10} m$

So Option. A) is correct...

Answer 2

Explanation:

The mass of an electron is equal to mass of a neutron.

Explanation-

The mass of electron is 200 times smaller than the mass of neutron

The mass of electron is ⬇

9.10939× {10}^{ - 31} kg9.10939×10

−31

kg

kg and that of neutron is ⬇

1.67493× {10}^{ - 27} kg.1.67493×10

−27

kg.

18) I would like to explain...

According to Thomson model of an atom:

1. An atom has spherical shape with radius ≈

{10}^{ - 10} m10

−10

m

So Option. A) is correct