Across
- 3. When a molecule is made of 2 or more elements, what is it called?
- 8. The number that comes in front of a chemical formula that you distribute.
- 9. What are all things made of?
- 10. The subatomic particle of an atom that is positively charged.
- 11. What is the other name for the vertical families of the periodic table that determines and groups elements by chemical properties, reactivity, and the number of valence electrons?
Down
- 1. Elements in Group 18 have the least __________ because they already have a full valence electron shell.
- 2. The small, lower "exponent" on an element that signals how many there are of it.
- 4. The subatomic particle of an atom that is negatively charged.
- 5. The 7 horizontal rows on the periodic table that group the elements by how many energy levels they have.
- 6. The subatomic particle of an atom that is neutrally charged.
- 7. What is matter made of? (Singular)