Across
- 1. When two or more compounds or elements are present without being chemically bonded together.
- 6. Different types of atoms have different number combination of ____________ particles
- 7. the symbol for this on the periodic table is Mg
- 8. the relative electric charge of this sub-atomic particle is +1
- 9. the symbol on the periodic table for this is H
- 10. this sub-atomic particle has a relative mass of 1/1840
Down
- 2. substance made up of only one type of atom.
- 3. on this the elements are ordered and arranged into rows and columns.
- 4. the smallest part of an element that can exist.
- 5. 2 different element chemically joined/bonded together.