20. Chlorine, iodine and bromine are nonmetals. What BEST distinguishes a non
metal from a metal is its
a. Homogeneity
b. Boiling point
c. Poor conductor of electricity
d. ductility
21. An element was subjected into flame and the acidity of the oxide formed was
tested. Solution of this oxide turned red litmus paper to blue. Most likely
that element is
a. Chlorine
b. Nickel
c. Phosphorous
d. Silicon
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20.A 21.B
Explanation:
that is the correct answer