Question

have the same chemical properties, whereas have different chemical properties.

• A. Isobars
• B. Isotopes
• C. Electrons
• D. Protons

Answer 1

Answer: (A), (B)

The correct options are
A Isobars
B Isotopes

Chemical properties of an atom depends on the valency electrons. Isotopes are the atoms that have same number of protons, but different number of neutrons. The number of electrons is always equal to the number of protons, so isotopes have the same number of electrons. Therefore, isotopes have the same chemical properties.
The atoms of isobars have the same number of nucleons, but different number of protons as well as neutrons. Since, the number of electrons is always equal to the number of protons, the isobars have different number of electrons. Therefore, isobars have different chemical properties.