Question # 1

How many periods are there is the Periodic table.

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Five

Six

Seven

Eight

The mass of an atom is almost due to the.

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Electron

Proton

Nucleus

Neutrons

The numebr of electorns present in an atom s equal to number of.

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Nucleus

Neutrons

Proton

Atom

The elements of group 18 are called.

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Alkali metals

Noble gases

Alkaline metals

Transition metals

Element present in grops have same number of ....... in their outermost shell.

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Electron

Proton

Atoms

Neutron

The particles of an element having different mass numbers.

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Proton

Neutrons

Isotopes

Atoms

Formula showing maximum number of electrons in a shell.

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n2

2n2

3n2

4n2

The total numebr of electrons which M shell can accommodate

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2

8

18

32

Area around nucleus where electrons are found are called.

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Orbit

Shell

Both a and b

None of these

In .... elements are arranged in order of increasing atomic numbers.

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Group

Period

Orbit

Shell

--------------- are fundamental particles of an atom.

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Electron

Proton

Neutron

All of these

Letter K is used to express theshell around the nucleus of an atom.

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1st

2nd

3rd

4th

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Science 7th Class English Medium Chapter 4 Online Test MCQs With Answers

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