Question

Question 9 Which statement is true: The atomic mass of an atom is equal to the number of neutrons in the nucleus The atomic number of an atom is equal to the number of neutrons in its nucleus The atomic weight of an atom is the sum of neutrons plus electrons The atomic weight of an atom is the sum of its protons and neutrons

Answer 1

Answer:

The atomic weight of an atom is the sum of its protons and neutrons

Explanation:

The weight of an atom is dominated by the amount of matter contained in the dense and tiny nucleus of an atom. In the nucleus, protons and neutrons are found. Protons are massive nuclear particles that are positively charge. Neutrons are also massive and they carry no charges.

The atomic weight is given as the sum of the protons and neutrons. Electrons have little to no weight.