To determine the number of protons in each atom of the elements mentioned, we can look at their atomic numbers on the periodic table. The atomic number of an element indicates the number of protons in the nucleus of each atom of that element.
(a) Helium:
- Helium's atomic number is 2. This means that each atom of helium contains 2 protons in its nucleus.
(b) Argon:
- Argon's atomic number is 18. Therefore, each atom of argon contains 18 protons in its nucleus.
(c) Lead:
- Lead's atomic number is 82. Hence, each atom of lead contains 82 protons in its nucleus.
By referencing the atomic numbers of these elements, we can easily determine the number of protons present in each atom of helium, argon, and lead.
