chemistry
Across
- 3. it has the same number of protons but different of neutronse e.g. the the same atomic number but different mass number?
- 5. a table with elements on it?
- 10. what is in the middle of the shell?
- 11. it is the number of the mass?
Down
- 1. it is a row of elements on aperiodic table?
- 2. it is a colome of a element in a periodic table?
- 4. it has a positive charge?
- 6. what is the track the electron goes around on?
- 7. it is a number only of atoms?
- 8. somthing what flys quickly around the nucleus?
- 9. it is only made upof one type of atom?
- 12. it is something what is very small and what makes up alot of to make an object?
- 13. it has a nuetrol charge?