Question

If mass of protons and neutrons are doubled then percentage increase in atomic mass of Ne²⁰ will be :
a. 100
b. 90
c. 75
d. 80​

Answer 1

Answer:

100

Step-by-step explanation:

ne

20

e = 10

Number of protons = 10 = 10 amu

Number of neutrons = 10 = 10 amu

Total mass = (10 + 10)= 20 amu

Mass of the electron is negligible.

If the mass of the neutron is doubled, then the total mass = (10×2) + (10×2) = 40 amu.

Therefore, the % of the increase

\begin{gathered} \frac{40 - 20}{20} \times 100 \\ \\ \frac{20}{20} \times 100 \\ \\ 1 \times 100 \\ \\ 100\%.\end{gathered}

20

40−20

×100

20

20

×100

1×100

100%.

Answer 2

Answer:

6ç 12

→e=6

Number of protons = 6=6amu

Number of neutrons = 6=6amu

Total mass = (6+6)=12amu

Mass of the electron is negligible.

If the mass of the neutron is doubled, then the total mass = (6×2)+6= 18amu

Therefore, the % of the increase = =

12

18−12

×100=50%

Step-by-step explanation:

l hope it will help u ☺️✌️☺️