What do the numbers listed for an element on the periodic table represent?

The number with a higher value is the number of protons, and the number with a lower value is the number of neutrons.

The number with a higher value is the number of electrons, and the number with a lower value is the number of protons.

The number with a higher value is the mass, and the number with a lower value is the number of protons.

The number with a higher value is the number of protons, and the number with a lower value is the mass.

Question

Pongo

Chemistry

8 February, 22:55

What do the numbers listed for an element on the periodic table represent?

The number with a higher value is the number of protons, and the number with a lower value is the number of neutrons.

The number with a higher value is the number of electrons, and the number with a lower value is the number of protons.

The number with a higher value is the mass, and the number with a lower value is the number of protons.

The number with a higher value is the number of protons, and the number with a lower value is the mass.

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Answers (1)

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Jerry Barton · Answer 1

The answer is The number with a higher value is the mass, and the number with a lower value is the number of protons.

The number with a higher value is the mass. This is because t he mass number of the element is the sum of the number of protons and number of neutrons in the nucleus of the atom. On the other hand, the number with a lower value is the number of protons. The number of proton in the nucleus of the atom is t he atomic number of the element. It involves only numbers of protons, thus, it has the lower value than the mass number.

For example, hydrogen has 1 proton and 1 neutron. Its atomic number is 1 ( = number of protons). Its mass number is 2 (1 proton + 1 neutron = 2). Thus, mass number has higher value than the atomic number.