Question

8th Grade Checkpoint 1

Which statement accurately describes the atoms of a specific element?
An iridium, Ir, atom contains 77 protons inside the nucleus and 115 neutrons outside the nucleus.
palladium, Pd, atom contains 46 electrons outside the nucleus and 45 neutrons inside the nucle
An antimony, Sb,atom contains 51 protons inside the nucleus and 51 electrons outside the nucleu
A mercury, Hg, atom contains 80 electrons and 80 protons inside the nucleus.

Answer 1

Antimony, Sb, an atom contains 51 protons inside the nucleus and 51 electrons outside the nucleus.

Step-by-step explanation:

Option “C” is correct because protons exist inside the nucleus and electrons exist outside the nucleus. Moreover, Sb has the number of protons 51 that is found in the nucleus and it has 51 electrons that exist outside the nucleus. However, the nucleus contains protons and neutrons while electrons exist outside of the nucleus. All the given options do not follow such condition therefore, all the statements are incorrect accept option 3rd.