Across
- 3. stable subatomic particle that has a positive charge equal hiugiunp
- 5. any substance that has a defined composition. Reaction the act or process or an instance of reacting.
- 7. a subatomic particle of about the same mass as a proton but without an electric charge hfvbsdhvbhbhbhbb
- 9. Chang
Down
- 1. An atom is the basic building block of chemistry fuktktvtlykfkutvr
- 2. electron is a negatively charged subatomic particle. fgyrserewuvfdvu
- 4. the property of an element that determines the number of other atoms with which an atom of the element can combine Electron
- 6. Levels
- 8. Cloud