Halogens (atoms with 7 valence electrons) and Hydrogen
or generally, atoms with their shells almost full
Solid state of matter
- the atoms are tightly packed in orderly form, they slightly vibrate but are stuck in a fixed position. Solids cannot be compressed and they maintain their shape
They have thier own group because because they have traits or metals and nonmetals
Becauze were made of LOTS of atoms actually ECERYTHING EVEN AIR is made of atoms
The instrument is a Geiger counter and is used to measure radioactive level around people's bodies.