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Questions and Answers
Which of the following indicates the number of protons in an atom's nucleus?
Which of the following indicates the number of protons in an atom's nucleus?
- mass number
- atomic weight
- atomic mass
- mass weight
- atomic number (correct)
How are radioisotopes useful in the treatment of cancer patients?
How are radioisotopes useful in the treatment of cancer patients?
- When they are created they absorb radioactive energy and destroy cancer cells
- When they decay they release radioactive energy and destroy cancer cells (correct)
- When they decay they absorb radioactive energy and destroy the cancer cells
- Radioisotopes are harmful so they are not useful in the treatment of cancer
- When they are created they absorb radioactive energy and destroy cancer cells
Which of the following molecules contain polar covalent bonds?
Which of the following molecules contain polar covalent bonds?
- H2
- CH4
- O2
- H2O (correct)
The _____ bonds between the carbon atoms in unsaturated fatty acids of phospholipids helps to ______ fluidity of membranes.
The _____ bonds between the carbon atoms in unsaturated fatty acids of phospholipids helps to ______ fluidity of membranes.
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What is the difference between atomic mass and atomic weight?
What is the difference between atomic mass and atomic weight?
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