Across
- 2. The ______________ experiment discovered the nucleus and the fact that the stom is mostly empty space
- 4. an atom with more electrons than protons
- 8. |actual-theorectical|/theorectical *100
- 9. What is the weight atomic mass of bromine if Br-79 has an abundance of 50.69% and Br-81 has an abundance of 49.31% ( round to nearest whole number)
- 10. Law that states compounds form in whole number ratios
- 12. An atom with a charge
- 15. an atom with the same number of protons but a different number of electron is know as an____________
- 16. subatomic particles that are found in the nucleus
- 18. Matter can not be created or destroyed
- 22. The way in which atomic masses are found when an atom contains an isotope
- 25. The scientist who is associated with the planetary atomic model
- 26. subatomic particles that are found outside of the nucleus, have a negative charge and relatively no mass
- 27. The subatomic particle that has no charge
- 28. the first person associated with the idea of the atom
Down
- 1. What is the weighted average atomic mass of lead if its isotopes are as follows: Pb-204 1.4%, Pb-206 24.1%, Pb-207 22.1% and Pb-208 52.4%
- 3. law that states element can combine in different ratios to make compounds
- 5. an atom that has 12 protons and 14 electrons has a _____________ charge
- 6. Protons, neutron and electrons are referred to as ____________________ particles
- 7. The sum of the masses of all the protons and neutrons in an atom
- 11. how many neutron does C-14 have?
- 13. an atom with the same number of protons but a different number of electron is know as an____________
- 14. Schrodinger's model of the atomic is known as the ______________ or cloud model
- 17. the amount of a particular isotope in relation to all other existing isotopes of that element
- 19. The number of protons and electrons in a neutral atom
- 20. A test in which a solution of a metal is heated in a flame and color is observed due to electrons being excited and then falling back down to a ground state and emitting light
- 21. An atom with more protons than electrons
- 23. The ______________ experiment discovered the nucleus and the fact that the stom is mostly empty space
- 24. The scientist that is credited with discovering the nucleus