- which compounds are a covalent bond ? CF4 or Cs2S
- Which is true about physical property? A. It is not associated with reactivity of a substance B. It alone determines how a substance reacts with other substance C. It is synonymous with a substance physical state D. None of the above
- Which of the following is a compound? A. Water B.soduim C.chlorine D.Oxygen
- which is true about neutrons and protons ? A. They are exactly equal to each other B. They are exactly equal to 1amu C. They have negligible mass D. They have masses slightly greater than 1amu
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