Multiple ChoiceHow many protons are present in an atom with an atomic number of 23 and a mass number of 51?44views
Multiple ChoiceWhich of the following descriptions correctly describes the structure of an atom?33views
Multiple ChoiceWhich of the following is the smallest chemical unit that retains the properties of a pure substance?42views
Multiple ChoiceWhich of the following is the number of protons in a neutral atom of nickel (Ni)?37views
Multiple ChoiceIn which parts of an atom are electrons, protons, and neutrons primarily located?37views