This question is about atomic structure.
Atoms contain subatomic particles. Table 1 shows properties of two subatomic particles. Complete Table 1:
Define mass number.
Two naturally occurring isotopes of magnesium are 24Mg^{24}\text{Mg}24Mg and 26Mg^{26}\text{Mg}26Mg. Why do these isotopes have the same chemical properties?
The model of the atom changed as new evidence was discovered. Describe the differences between the nuclear model of the atom and the plum pudding model.