periodic table of elements

elements

100

what are alkaline metals known as? 

group IA 

200

transitions metals are fairly what?

unreactive 

300

metals solid at what point?

room tempature

400

HALOGENS have how many valence electrons 

7

500

lanthanides have high what  

melting and boiling points  

periodic table

100

RH stands for ________

 Rhodium

200

CO stands for _______

cobalt 

300

H stands for _______

hydrogen

400

HE stands for_______

Helium