1. a. Proton - It has positive charge
b. Neutron - It has neutral charge
c. Electron - It has negative charge
2. The number of protons in one atom of an element determines the atom's Atomic number, and the number of electrons determines the number of shells of an element.
3. The atomic number tells you the number of Protons in one atom of an element. It also tells you the number of electrons in a neutral atom of that element. The atomic number gives the “identity” of an element as well as its location on the Periodic Table. No two different elements will have the same atomic number.
4. The Atomic mass of an element is the average mass of an element’s naturally occurring atoms, or isotopes, taking into account the Abundance of each isotope.
5. The Mass number of an element is the total number of protons and neutrons in the nucleus of the atom.
6. The mass number is used to calculate the number of neutrons in one atom of an element. In order to calculate the number of neutrons you must subtract the protons from the atomic mass.
7. Lithium - Li, 3
Iron - Fe, 26
Oxygen - O, 8
Arsenic - As, 33
Bromine - Br, 35
Copper - Cu, 29
Mercury - Hg, 80
Helium - He, 2
Parent Tip: Review the logic above to help your child master the concept of atom structure worksheet.
