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