Why do the masses of atoms of the same element may differ?

Answer 1

some atoms may have more or fewer universes! Remember on jonny test, he went in his own atoms and boom! He had his very OWN UNIVERSE lets hope you have more universes than Jonny Test!

Answer 2

Different isotopes of an element have different masses. This is because different isotopes of an element although they have the same number of protons (which defines the chemistry and therefore defines the element) have different numbers of neutrons.

Example

• Chlorine-35 Atomic Mass approx. 35 (17 protons, 18 neutrons)
• Chlorine-37 atomic mass approx. 37 (17 protons, 20 neutrons)

Answer 3

Atoms of the same element always have the same number pof protons, the atomic number, Z. Atoms of the same elemnt may have different numbers of electrons and neutrons. The different numbers of electrons are designated by the charge of the atom. The different numbers of neutrons are designated by the mass number and these substances are called isotopes. For example, carbon-12 and carbon-14 are isotopes of carbon. The 14 and 12 represent the atomic weight. Carbon-12 has 6 neutrons and 6 protons and Carbon-14 has 8 neutrons and 6 protons.

Answer 4

The number of neutrons can vary, resulting in various isotopes. During chemical reactions an atom may also gain or lose electrons, becoming an ion.

Answer 5

The only difference between atoms of the same element may be the number of neutrons in the nucleus of the element.

Answer 6

The correct answer is neutrons

Answer 7

Yes, such atoms are called as Isotopes