Multiple ChoiceHow many protons are present in an atom with an atomic number of 23 and a mass number of 51?52views
Multiple ChoiceWhich of the following descriptions correctly describes the structure of an atom?44views
Multiple ChoiceWhich of the following is the smallest chemical unit that retains the properties of a pure substance?53views
Multiple ChoiceWhich of the following is the number of protons in a neutral atom of nickel (Ni)?43views
Multiple ChoiceIn which parts of an atom are electrons, protons, and neutrons primarily located?46views