Atoms that have the same number of protons but differ in their number of neutrons are _________________.
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Q22: Due to hydrogen bonding,ice is _ dense
Q23: We use the _ scale to measure
Q24: Cells contain chemical substances called _ that
Q25: A substance that increases the concentration of
Q26: Discuss the difference between covalent,ionic and hydrogen
Q28: Which statement is incorrect about acid rain?
A)It
Q29: When water ionizes,the negatively charged OH fragment
Q30: Water moving up into a paper towel
Q31: The number of protons in the nucleus
Q32: What are two of the characteristics of
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