Across
- 2. An element is matter that is composed of one type of
- 5. number of protons and the number of neutrons in the
- 6. An element is matter that is composed of one type of
- 8. of an atom.
- 9. Protons and neutrons are made up of smaller particles called
- 10. are particles with an electrical charge of 1.
- 12. The vertical columns in the periodic table are called
- 13. are neutral particles that do not have an electrical charge.
Down
- 1. are particles with an electrical charge of 1.
- 3. Atmos of the same element that have different numbers of neutrons called
- 4. The of an atom is the sum of
- 7. cloud The area around the nucleus of an atom
- 11. Protons and neutrons are found in a small, positively charged center of the atom called the