Chemistry Vocab 4a

4. subatomic particle of about the same mass as a proton without an electric charge
8. every compound is formed of elements combined in specific ratios by mass that are unique for that compound
9. a region around the nucleus containing a specified group of electrons in sub-levels and orbitals
12. an emission spectrum that consists of a continuum
14. smallest particle capable of chemical interactions
15. having to do with quantities in which there are only separate discrete values allowed
16. number of protons in the nucleus
17. atoms lowest energy state, contains six or seven levels
18. positive particles in the nucleus

1. subatomic particle with a charge of negative electricity
2. the concept that if waves can behave like particles then particles can also behave like waves
3. a packet of electromagnetic energy modeled as a particle that transmits electromagnetic force in the standard model of matter
5. the principle that it is impossible to now both the energy or momentum and the exact position of an electron at the same time
6. an emission spectrum consisting of separate isolated lines
7. positively charged central core of an atom
10. a 3d region of space around a nucleus in which as many as 2 electrons are likely to be found
11. helium nucleus emitted by some radioactive substances, originally regarded as a ray
13. a beam of electrons emitted from the cathode of a high vacuum tube