Name________________________
Date___________________
Atomic Structure Questions
1. A(n) ______________ is an atom that has gained or lost one or more electrons.
2. A(n) ______________ is a neutrally charged subatomic particle found in the nucleus.
3. A(n) ______________ is a negatively charged subatomic particle found outside and
orbiting the nucleus.
3. The atomic mass unit (u) is based on an atom of the isotope ________________.
4. The atomic _____________of an atom is equal to the number of protons it has.
5. The atomic _____________ is equal to the total number of protons and neutrons in
its nucleus.
6. Atoms of the same element with differing masses are called ______________.
7. Compare the elements, oxygen, nitrogen and phosphorus. Please state the atomic
number, atomic mass and number of subatomic particles to each. You will need your
periodic table!
Oxygen
Atomic Number _________
Atomic Mass __________ g/mol
Protons ______
Neutrons _____
Electrons _____
Nitrogen
Atomic Number _________
Atomic Mass __________ g/mol
Protons ______
Neutrons _____
Electrons _____
Phosphorus
Atomic Number _________
Atomic Mass __________ g/mol
Protons ______
Neutrons _____
Electrons _____