1. Oxygen (O): Atomic Number = 8, Element Symbol = O, Element Name = Oxygen, Atomic Mass = 16.00
2. Carbon (C): Atomic Number = 6, Element Symbol = C, Element Name = Carbon, Atomic Mass = 12.01
3. Neon (Ne): Atomic Number = 10, Element Symbol = Ne, Element Name = Neon, Atomic Mass = 20.18
4. Potassium (K): Atomic Number = 19, Element Symbol = K, Element Name = Potassium, Atomic Mass = 39.10
What 2 parts of an atom does the atomic number (#) represent? Protons and Electrons
If an element has 45 protons, how many electrons does it have? 45
How do you figure out the # of neutrons? Subtract the atomic number from the atomic mass.
Rules for arranging electrons:
1. The 1st energy level can hold up to 2 electrons.
2. The 2nd energy level can hold up to 8 electrons.
3. The 3rd energy level can hold up to 8 electrons.
What term is used to describe the electrons in the outermost energy level? Valence Electrons
Sketch an Atom: Boron (B)
- Atomic Number = 5
- Protons = 5
- Electrons = 5
- Neutrons = 6
- Electron Configuration: 2 in first shell, 3 in second shell
Sketch an Atom: Lithium (Li)
- Atomic Number = 3
- Protons = 3
- Electrons = 3
- Neutrons = 4
- Electron Configuration: 2 in first shell, 1 in second shell
Parent Tip: Review the logic above to help your child master the concept of atomic structure worksheet with answers.
