Match the following items. 1. not affected by a magnet
atoms
2. mostly space
solid
3. flows freely but particles still attract
electron (beta)
4. positively charged particles
alpha particles
5. free to move in all space
gamma ray
6. negatively charged particles
gas
7. atoms nearly fixed in space
liquid
8. helium nucleus
proton

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.