Each element has a name and . . . . . . . .
A. a unique shape
B. a unique colour
C. a unique physical symbol
D. a unique chemical symbol
Answer: Option D
A. a unique shape
B. a unique colour
C. a unique physical symbol
D. a unique chemical symbol
Answer: Option D
Traditional 'battery' contains which of the following chemicals?
A. Ethylene glycol
B. Sulphuric acid
C. Sodium bicarbonate
D. Ethanol
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