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1 August, 23:49

Which statements describe elements? Check all that apply.

A) Atoms of the same element can have different numbers of protons.

B) Atoms of the same element always have the same number of electrons.

C) Atoms of the same element can have different numbers of neutrons.

D) Atoms of the same element always have the same number of neutrons.

E) Atoms of the same element always have the same number of protons.

F) Atoms of the same element can be isotopes of that element.

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  1. 2 August, 01:26
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    The answers are B, C, E and F.

    Atoms from an element is mostly made of protons, neutrons, and electrons. Proton numbers are like a class number for each element. Each element has their own and they're all different. And the number of protons are equal to the number of electrons. Therefore, B is correct.

    Isotopes. It's different atoms from a same element that has the same number of protons but different number of neutrons. For example in hydrogen, there's 3 Isotopes for hydrogen. Therefore, C is correct.

    Again, proton for the same element is never changed, even if they're different Isotopes. So, E is correct.

    Isotopes, again, different elements may have different Isotopes. Some has only 1, others may have a few or more. So, F is correct too.
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