Multiple ChoiceHow many protons are present in an atom with an atomic number of 23 and a mass number of 51?35views
Multiple ChoiceWhich of the following descriptions correctly describes the structure of an atom?21views
Multiple ChoiceWhich of the following is the smallest chemical unit that retains the properties of a pure substance?32views
Multiple ChoiceWhich of the following is the number of protons in a neutral atom of nickel (Ni)?29views
Multiple ChoiceIn which parts of an atom are electrons, protons, and neutrons primarily located?27views