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Atomic Number and Mass Number

97.To calcula...

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97.To calculate number of neutron in chlorine atom , why mass number is taken as 35 rather than 35.5.?

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Q. Why is atomic mass of chlorine taken as

35.5 u

and not a whole number like

35 u

36 u

Why is the atomic mass of chlorine taken as 35.5? [2 MARKS]

Q. In case of chlorine

^{35} C l_{17}

with atomic number

z = 17

and mass number

(A) = 35

has number of neutron equal to __________.

Q. The isotopes of chlorine with mass numbers

35

37

whose average mass is 35.5 exist in the ratio of:

Q. If the sum of the total number of protons and neutrons in in a pure sample of

M g C l_{2}

1.132 \times 10^{26}

then calculate the total number of moles of chlorine atoms present in the sample.
(consider all

C l

C l - 35

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