Question

The atomic symbol for beryllium 9/4be indicates that the

a
atomic number is equal to 9-4
b
mass number is 9
c
mass number is 4
d
atomic number is 9
ANSWER ASAP PLEASE

Answer 1

I believe the answer is B)

Answer 2

Answer: b) Mass number is 9.

The atomic symbol for beryllium 9/4 be indicates that the mass number is 9.

Step-by-step explanation:

Beryllium metal, Be was placed in second group and second period of periodic table. It occur as solid at 20°C. Its atomic number is 4 and the mass number is 9.

Atomic number, Z = number of proton or number of electrons in the atom.

Mass number = Atomic no + number of neutrons in the atomic nucleus.

So the atomic symbol for beryllium is indicated as mass number of 9.