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Chemistry Review Quiz

All oxygen atoms have ____ protons. 0
There are about ____ naturally occurring elements on Earth. 6
The mass of a proton is ____ times greater than an electron. 7
The pH of pure water at 25°C (77°F) is ____. 8
All carbon atoms have ____ protons. 18
Water freezes at 0° Celsius, ____° Fahrenheit, and 273° Kelvin. 32
The molar mass of water (H2O) is approximately ____ g/mole. 92
The most abundant isotope of hydrogen has ____ neutrons. 1836