Today we learned about atomic numbers and masses. The atomic number is equal to the number of protons in the nucleus. The mass of an atom is made from the protons and neutrons in the nucleus. The average atomic mass is found by the subtracting the number of protons from the atomic mass and rounding. Electrons are the outside the nucleus and are not included in the mass.
Practice Problems
1. The atomic number is the number of protons in the nucleus.
3. Magnesium
5. Carbon has a larger atomic mass than Boron because it has more neutrons the boron, making the mass heavier.
Good thorought summary!
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