Which element is found in potassium chlorate and zinc nitrate?
A. Hydrogen
*B. Oxygen
C. Potassium
D. Zinc
2. Atoms of which element have the weakest attraction for electrons?
*A. Na
B. P
C. Si
D. S
3. Which element is classified as a metalloid?
A. Sulfur
*B. Silicon
C. Barium
D. Bromine
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