Match the pairs. Group A Group B a. Proton i. Negatively charged b. Electron ii. Neutral c. Neutron iii. Positively charged

a. Proton is positively charged. Protons are present inside the nucleus of an atom. They are bound in the nucleus closely. b. Electron is negatively charged. Electrons are usually present outside the atom nucleus. It revolves around the nucleus of an atom in a discrete orbit. c. Neutron is neutral. Neutrons are present in an atom nucleus. They are bound in the nucleus closely. Proton, electron and neutron are sub-atomic particles present in an atom. Group A Group B a. Proton iii. Positively charged b. Electron i. Negatively charged c. Neutron ii. Neutral

E M B I B E

General Science>Chapter 5 - Inside the Atom>Exercises>Q 4

EASY

8th Maharashtra Board

IMPORTANT

Earn 100

Draw a neat labelled diagram of Thomson's atomic model.

Important Questions on Inside the Atom

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 5 - Inside the Atom>Exercises>Q 4

Draw a diagrammatic sketch of the electronic configuration of Magnesium (Atomic number

12

).

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 5 - Inside the Atom>Exercises>Q 4

Draw a diagrammatic sketch of electronic configuration of Argon (Atomic number

18

).

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 5 - Inside the Atom>Exercises>Q 5

Fill in the blank with the correct word given in the bracket. (molecular particles/ sub-atomic particles)

Electrons, proton, neutron are the types of _____ in an atom.

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 5 - Inside the Atom>Exercises>Q 5

An electron carries a _____charge.

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 5 - Inside the Atom>Exercises>Q 5

The electron shell _____ is nearest to the nucleus.

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 5 - Inside the Atom>Exercises>Q 5

The electronic configuration of magnesium is $2, 8, 2 .$ From this it is understood that the valence shell of Magnesium is_____.

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 5 - Inside the Atom>Exercises>Q 5

The valency of hydrogen is 'one' as per the molecular formula $H_{2} O$ . Therefore valency of 'Fe' turns out to be_____ as per the formula ${Fe}_{2} O_{3}$ .

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 5 - Inside the Atom>Exercises>Q 6

Match the pairs.