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Atomic Number and Mass Number

boron exist a...

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boron exist as two isotopes ^{10}B and ^{11}B if atomic mass of boron in periodic table is given to 10.81 what is the relative abundance of the heaver isotop?

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Q. Boron has two isotopes,

^{10} B

^{11} B

whose relative abundances are

20

80

% respectively. Atomic weight of boron is:

Q. Boron has two stable isotopes,

^{10} B (19 %)

^{11} B (81 %)

. Calculate average atomic mass of boron in the periodic table.

Q. Atomic mass of boron is 10.81. It has two isotopes namely

_{5}^{11} B

_{5}^{x} B

with their relative abundance of 80% and 20% respectively. The value of x is:

Q. Atomic mass of boron is 10.81. It has two isotopes with 80% and 20% abundance respectively. The atomic mass of the isotope having 80% abundance is 11.01. The atomic mass of the other isotope is:

Boron has two stable isotopes,

^{10} B (19 %)

^{11} B (81 %)

. Average atomic weight for boron in the periodic table is:

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