Question

8. Atomic weight of an element is :
a) Twice the number of electrons in its atom
b) Equal to the number of protons in the nucleus of its atom
c) twice the number of neutrons in the nucleus of its atom
d) equal to the sum of neutrons and protons in the nucleus of its atom

Answer 1

Answer:

a.Carbon has twice as many electrons in its second shell as in its first shell.

b. The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

c.Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus. Its nucleus also contains two neutrons.

d.The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

Explanation:

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Answer 2

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