Question

The weight of an atom is determined by the number of neutrons and protons that are present in the nucleus. The proton and neutron, which are similar in mass, each weighs approximately 1836 times greater than a single electron, thus the mass contributed by electrons is insignificant when determining atomic weight or atomic mass. The atomic mass is the sum of the protons and neutrons in the nucleus. Carbon has an atomic mass of twelve. Since there are six protons and six neutrons in the nucleus

(i)How can you calculate atomic mass of an atom?

(ii)What is the atomic number of carbon?

(iii)In 16O8, the number 16 stands for-----------

(a)Atomic number (b) Atomic mass (c) Atomic mass scale (d) Number of electron

(iv)How many neutrons oxygen has?​

Answer 1

(i) Atomic mass = no. of neutrons + no. of protons

(ii) 6

(iii) b (atomic mass)

(iv) 8