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6 . Remaining solid on filter paper is known as
A. stone B. residue
C. particles D. solution

7 . Letter used to identify an element in periodic table is known as
A. idea B. hint
C. symbol D. formula

8 . Iron, cobalt and nickel are metals which are
A. magnetic B. insulator
C. non-magnetic D. none of them

9 . Elements that are brittle and cannot be rolled into wires are known as
A. non-elastic B. non-metal
C. liquid D. metal

10 . There are ______ nonmetals.
A. 20 B. 21
C. 22 D. 23