Refer to the periodic table and select the symbol of the element that fits each of the

Question:

Refer to the periodic table and select the symbol of the element that fits each of the following descriptions.

(a) The semimetal in the third period 

(b) The semimetal in the fourth period and Group VA/15 

(c) The halogen that exists as a reddish-brown liquid 

(d) The noble gas that is radioactive.

Periodic Table:

2 3 4 10 6 3 7 11 Li 6.94 1 IA Na 22.99 19 37 5 Rb K 39.10 al 55 4 87 2 IIA Fr (223) Be 9.01 12 Mg 24.31 Sr

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