Responses
Hydrogen only has one electron
Hydrogen only has one electron
Hydrogen is in the first row and the first column of the periodic table.
Hydrogen is in the first row and the first column of the periodic table.
Hydrogen is stable, with two electrons in its outer shell.
Hydrogen is stable, with two electrons in its outer shell.
Hydrogen does not have any neutrons.
1 answer
The statement that best explains why hydrogen’s atomic number is equal to its mass is: Hydrogen does not have any neutrons.
Hydrogen's atomic number is 1, which means it has 1 proton and 0 neutrons. This means the most common isotope of hydrogen (protium) has a mass number of 1, making the atomic number equal to the mass for that isotope.
