Question

the atom of a particular element all have the same number of protons as neutrons. which of the following must be true?give reason to your answer?
(a) the atomic weight must be a whole no.
(b) the mass no. for each must equal the atomic weight of the element
(c) the mass no. must be exactly twice the atomic number for each atom
(d) all of the above are true
give reason to your answer?

Answer 1

Statement no. (c) is true.

The mass no. must be exactly twice the atomic number for each atom is true.

• The mass number refers to the sum of the number of protons and neutrons present in an atom.

Mass number(M)= P + N

• Atomic number refers to the total number of protons present in an atom.

Atomic number(A)= P

• Since the number of protons and neutrons are equal in this case, so the mass number is twice the atomic number.

M= P+ N or P+P

M = 2P.

Answer 2

Your answer for this question....