An element with mass number 81 contains 31.7% more neutrons as compared to protons. Find the symbol of the atom.

Question

An element with mass number 81 contains 31-7- neutrons as compared to protons- Assign the atomic symbol-

Toppr Admin · Accepted Answer

Let x be the number of protons-xA0-The number of neutrons is x-0-317x-1-317x-xA0-The mass number is 81-xA0-It is equal to the sum of the number of protons and the number of neutrons-81-x-1-317x-2-317xx-35Hence- the symbol is 8135Br-

An element with mass number $81$ contains $31.7 %$ more neutrons as compared to protons. Assign the atomic symbol.

Let $x$ be the number of protons.
The number of neutrons is $x + 0.317 x = 1.317 x$ .
The mass number is $81$ .
It is equal to the sum of the number of protons and the number of neutrons.
$81 = x + 1.317 x = 2.317 x$
$x = 35$
Hence, the symbol is $_{35}^{81} B r$ .

An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.

Let x be the number of protons. The number of neutrons is x+0.317x=1.317x. The mass number is 81. It is equal to the sum of the number of protons and the number of neutrons.81=x+1.317x=2.317xx=35Hence, the symbol is 8135Br.

An element with mass number $81$ contains $31.7 %$ more neutrons as compared to protons. Assign the atomic symbol.

Let $x$ be the number of protons.
The number of neutrons is $x + 0.317 x = 1.317 x$ .
The mass number is $81$ .
It is equal to the sum of the number of protons and the number of neutrons.
$81 = x + 1.317 x = 2.317 x$
$x = 35$
Hence, the symbol is $_{35}^{81} B r$ .