Question

An atom with nuclear charge of +13 and containing 14 neutrons has atomic number = ________ and mass number = __________.

• A. 13
• B. 27

Answer 1

• In a neutral atom, the atomic number = number of protons.
• Since, nuclear charge is the forces of attraction exerted by the nucleus on the electrons.
• The nuclear charge of an atom depends upon the number of protons.
• As the given atom has a +13 nuclear charge it means the number of protons is 13.
• Mass number = number of protons + number of neutrons
• Mass number = 13 + 14 = 27
• An atom with nuclear charge of +13 and containing 14 neutrons has atomic number = 13 and mass number = 27.