Which statement describes the number of protons in each atom of an element? A: The number of protons is given by the atomic number, which increases by one moving from left to right across each row of the periodic table.
The number of protons is given by the atomic number, which increases by one moving from left to right across each row of the periodic table.

B: The number of protons is given by the atomic number, which increases by one moving down in its column in the periodic table.
The number of protons is given by the atomic number, which increases by one moving down in its column in the periodic table.

C: The number of protons is given by the mass number, which increases by one moving from left to right across each row of the periodic table.
The number of protons is given by the mass number, which increases by one moving from left to right across each row of the periodic table.

D: The number of protons is given by the mass number, which increases by one moving down in its column in the periodic table.