Physics, 17.09.2019 17:30, hellokitty1647

How can two atoms of the same chemical element be different?
a.
they may be different allotropes of the element. each allotrope of the same element has a different number of neutrons.
b.
they may be different isotopes of the element. each isotope of the same element has a different number of electrons.
c.
they may be different isotopes of the element. each isotope of the same element has a different number of neutrons.
d.
they may be different allotropes of the element. each allotrope of the same element has a different number of electrons.

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How can two atoms of the same chemical element be different?
a.
they may be different...