Chemistry Exam Q&A | Complete Review with Detailed Explanations [updated 2025]

Chemistry Exam Q&A | Complete Review with
Detailed Explanations [updated 2025]


1. proton
particle that has a positive charge - located in the nucleus of an atom. You can
figure out the number of protons by looking at the atomic number of an element.




2. neutron
particle that has no charge - located in the nucleus of an atom. You can figure out
the number of neutrons by SUBTRACTING the atomic Mass minus the atomic
number.


3. element
substance that CANNOT be chemically broken down into simpler substances




4. atom
smallest part of an element that can be identified as that element




5. nucleus
center, or core, of an atom (where the protons and neutrons are located)

, 6. electron
particle that has a negative charge - located in rings outside the nucleus of an atom.
You can figure out the number of electrons by looking at the atomic number of an
element.




7. atomic number
number of protons in the nucleus of an atom. This is the same number as the
number of electrons




8. atomic mass
total mass of the protons and neutrons in an atom




9. energy level
place in an electron cloud where an electron is most likely to be found - rings.
Remember, 2-8-18-32.




10.metal
element that has the property of shiny luster, ductility, and malleability




11.luster