1) How many elements are there in Nature? a) o b) 1 c) 92 d) 118 2) Which substance is NOT on the Periodic Table? a) carbon (C) b) iron (Fe) c) aluminium (Al) d) water (H2O) 3) The Atomic Number of hydrogen is a) 0 b) 1 c) 2 d) 92 4) The symbol for lithium is a) Li b) LI c) lI d) li 5) How many elements are in the 2nd Row of the Periodic Table? a) 2 b) 8 c) 18 d) 32 6) How many elements are on the Periodic Table? a) 0 b) 1 c) 92 d) 118

6th Video A

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