How many electrons, protons and neutrons are there in a nucleus of atomic number $11$ and mass number $24$ ?
(i) number of electron $=$ __.
(ii) number of protons $=$ .
(iii) number of neutrons $=$ _.

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Solution

no. of electrons = atomic number $= 1$
no. of proton = atomic number $= 11$
no. of neutrons $= Z - A = 24 - 11 = 13$

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Which of the following are true for an element?
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Which of the following are true for an element?
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(ii) Mass number = number of protons + number of neutrons
(iii) Atomic number = number of protons = number of neutrons
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How many electrons, protons and neutrons are there in a nucleus of atomic number 11 and mass number 24?(i) number of electron = ________.(ii) number of protons = ________.(iii) number of neutrons = _______.

no. of electrons = atomic number =1no. of proton = atomic number =11no. of neutrons =Z−A=24−11=13

How many electrons, protons and neutrons are there in a nucleus of atomic number $11$ and mass number $24$ ?
(i) number of electron $=$ __.
(ii) number of protons $=$ .
(iii) number of neutrons $=$ _.

no. of electrons = atomic number $= 1$
no. of proton = atomic number $= 11$
no. of neutrons $= Z - A = 24 - 11 = 13$