The number of electrons present in outer most orbit of an atom is called ……………… electrons. 

Monjur Alahi

The number of electrons present in outer most orbit of an atom is called ……………… electrons. 

A) valency 

B) paired 

C) unpaired 

D) love pair


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Salim Ahmed Kawsar

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Correct option is A) valency

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The number of elliptical orbits present in Bohr’s third orbit 

Correct option is  B) 2

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When an electron jumps from higher orbit to lower orbit in an atom the energy is ……………. 

Correct option is  B) emitted

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a) s – sub shell i) Maximum number of electrons is 6,  b) p – sub shell ii) Maximum number of electrons is 14 

C) a→iii, b→i, c→iv, d→ii

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The inert gas element which does not have octet configuration in the outer most orbit is

Correct option is  D) He

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Transfer of electrons from one atom to other atom leads to…………….. bond. 

A) Ionic bond

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A neutral metal atom becomes dipositive ion by loosing two”electrons. In the same way a neutral non-metal atom becomes

Correct option is D) m2 x2

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An outer most shell which has 8 elec-trons is said to possess an ………………. configuration. 

Correct option is B) octet

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An atom with 8 electrons in its outer most shell is chemically …………  A) stable 

Correct option is A) stable

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The property of having 8 electrons in the outer most orbit is called  A) Atomicity 

Correct option is C) Octet

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……………….. are present in the outer surface layer of the leaf.

Stomata are present in the outer surface layer of the leaf.

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