Question

how many protons?
the atoms of any particular element always contain the same number of protons. for example:

• hydrogen atoms always contain ____ proton
• carbon atoms always contain ____ protons
• magnesium atoms always contain ____ protons.

the number of protons in an atom is known as the ______________.
there is an image of a periodic table element tile for c (carbon) with 12 at the top and 6 at the bottom, and an arrow pointing to the 6. also, partial text at the bottom: of the two numbers

Explanation:

Step1: Recall proton numbers of elements

Hydrogen is the first element, so it has 1 proton. Carbon has an atomic number of 6 (from the periodic table, as seen in the carbon symbol with 6 at the bottom), so 6 protons. Magnesium has an atomic number of 12, so 12 protons. The number of protons in an atom is the atomic number.

Step2: Fill in the blanks

• Hydrogen atoms: 1 proton.
• Carbon atoms: 6 protons.
• Magnesium atoms: 12 protons.
• The number of protons is the atomic number.

Answer:

Hydrogen: 1; Carbon: 6; Magnesium: 12; Atomic number