Every element is made of atoms, which are composed of smaller subatomic particles.
a.[2]
Complete the following statements about the atomic structure of the beryllium atom shown in the diagram:
- The subatomic particle orbiting the nucleus is an __________.
- The central nucleus contains __________ and __________.
b.[2]
Atoms are electrically neutral and have no overall charge. Explain why, using ideas about subatomic particles.
c.[2]
Look at the information about two isotopes of beryllium:
49Beand410Be^{9}_{4}\text{Be} \quad \text{and} \quad ^{10}_{4}\text{Be}49Beand410Be
Explain why these are called isotopes.