| A | B |
|---|
| particle accelerator | machine which moves atomic nuclei at higher and higher speeds until they crash into one another, sometimes forming heavier elements |
| nonmetal | element that lacks most of the properties of a metal |
| diatomic molecule | molecule that consists of 2 atoms |
| halogen | an element found in group 17 of per. table |
| noble gas | an element found in group 18 of per. table |
| metalloid | element that has characteristics of metals and nonmetals |
| semiconductor | substance tha can conduct electricity under some circumstances |
| plasma | gas-like state of matter consisting of free electrons and atoms that are stripped of their electrons |
| nuclear fusion | process in which 2 atomic nuclei combine to form a larger nucleus, forming a heavier element and releasing huge amounts of energy |
| nebula | the cloudlike region of gases left over in the remains of a shrinking sun-sized star |
