Deuterium differs from Hydrogen in having:
Correct answer C. Same atomic number and different atomic weight
Tip: press A, B, C or D to answer, and N for the next question.
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See allThe chemical name of quartz is:
Correct answer A. Silicon Dioxide
The number of electrons of a neutral atom is automatically known if one knows the?
Correct answer A. Atomic number
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Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere?
Correct answer B. Chlorofluorocarbons
Phosphorus is an essential component of one of the following biological molecules:
Correct answer B. Nucleic acids
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