Science vocab

1. Any of the chemicals that make up the center group of the PTE
5. A chemical element that does not react
7. A chemical element with metal and nonmetal properties
10. Any of the chemicals that make up group 1 of the PTE
11. rows on the PTE
13. when an atom gains an electron
15. the emission of energy in the form of ionizing radiation
16. A solid, shiny, malleable substance
18. an area around the nucleus where an electron is most likely to be found
19. a chemical element where the atom has the same number of protons but a different number of neurons
21. any of the series of elements with increasing atomic numbers
23. a subatomic particle with no electric charge

2. the number of protons in an atom
3. 15 chemical elements that tarnish when exposed to oxygen
4. a chemical element that forms salt when it reacts
6. columns on the PTE
8. the release of energy from the decay of the nuclei of certain kinds of atoms and isotopes
9. not a metal
12. center of a cell
14. a subatomic particle with a negative electric charge
17. when an atom loses an electron
19. formed when an atom gains or loses one or more electrons
20. a subatomic particle with a positive electric charge
22. a unit of mass used to express atomic weight