Which of the following pairs of molecules form hydrogen bonds?
A. C2H5OH and CH3OH B. CH3OH and H2 C. H2S and CH4 D. NH3 and SO2 Correct Answer: Option A = C2H5OH and CH3OH
Protons and electrons are called fundamental particles because they
A. are indivisible B. have different charges C. are the lightest particles D. are found in all matter Correct Answer: Option D – are found in all matter
The region around the nucleus where electrons can be located is called?
A. a spectra B. an orbital C. a quanta D. a field Correct Answer: Option B – an orbital
The following ions have the same electron configuration except 8O; 12Mg; 13AI; 17CI
8O, 12Mg, 13AI, 17CI A. CI− B. O2− C. Mg2+ D. AI3+ Correct Answer: Option A = CI−
An element Q; contains 69% of 63Q and 31% of 65Q. What is the relative atomic mass of Q?
An element Q; contains 69% of 63Q and 31% of 65Q. What is the relative atomic mass of Q? A. 63.0 B. 63.6 C. 65.0 D. 69.0 Correct Answer: Option B = 63.6Products
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