The diagram below shows part of the Periodic Table.

Using only the symbols of the elements shown above, write down the symbol for an element which:

a. Is a pale green coloured toxic gas

b. Is stored under oil 

c. Has five electrons in its outer electron energy shell

d. is the most reactive Group II element

e. Is the most reactive halogen

f. Is the only liquid shown

g. Is a transition element

h. Is a gas with two electrons in its outer shell.

Transcribed Image Text:

II V V VI VII 0 He H Li Be Si P CI Ar Ca Zn Ga Se Br B.