Element Arrangement Quick Check

Why is it impossible for an element to have an atomic number of 110.5? (1 point)

A)Atoms with atomic numbers greater than 100 are unstable.

B)Exactly half of the isotopes would need an atomic number of 110, and half would need an atomic number of 111, which is very unlikely.

C)Atoms of an element all have the same whole number of protons.

D)Atoms of an element all have the same whole number of protons and neutrons.

Question

20-09-2022
Chemistry

Answered

Element Arrangement Quick Check

Why is it impossible for an element to have an atomic number of 110.5? (1 point)

A)Atoms with atomic numbers greater than 100 are unstable.

B)Exactly half of the isotopes would need an atomic number of 110, and half would need an atomic number of 111, which is very unlikely.

C)Atoms of an element all have the same whole number of protons.

D)Atoms of an element all have the same whole number of protons and neutrons.

Answer :

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shrivastavarupam shrivastavarupam · Answer 1 · 2022-09-24T02:16:46-04:00

It is impossible for an element to have an atomic number of 110.5 because atoms of an element all have the same whole number of protons. Thus, option (c) is correct.

What is atomic number of elements?

The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element.

The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom. For example, in a sodium atom, there are 11 electrons and 11 protons. Thus the atomic number of Na atom = number of electrons = number of protons = 11

The atomic number is based only on the number of protons in the nucleus of an atom. Since this is a count of whole numbers, it cannot be a decimal. It's either element 110 or 111, not 110.5. There is no half proton in the atom hence we can not have an atomic number of 110.5.

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