Chemistry FA

4. a sub-atomic particle with a positive charge
5. potassium's electronic configuration is 2,8,8,1, which period is it in?
6. particles collide and diffuse , this is proved by _______ theory
10. this holds the all the protons and neutrons in an atom
12. tritium and deuterium are isotopes of_____
13. neutrons have ______ charge
14. movement of particles from higher concentration to lower concentration
16. the no. of valence electrons in an element determines it's ______
17. a separation technique which starts with evaporation followed by condensation
18. hidden heat used to change the matter of particles
19. when two or more elements bond in a fixed proportion it's called a _____

1. change from gas to solid
2. element with an electronic configuration 2,8,3
3. slows, liquids and gasses are types of ______
7. same element with same atomic number but different atomic mass
8. adding impurities to a substance ______ the melting point
9. another term for atomic mass
11. when this factor increases rate of diffusion increases
14. rule that states , the K shell can hold only 2 electrons
15. this state of matter can't be compressed and only vibrates at its fixed position