Question

be 4 beryllium 9.012 how many protons does this atom have? 5 4 9.012 be

Explanation:

Step1: Recall Atomic Number Definition

The atomic number (the number at the top of the element's box in the periodic table) equals the number of protons in an atom.

Step2: Identify Atomic Number of Be

For Beryllium (Be), the atomic number is 4 (seen as the number "4" above "Be" in the periodic table box).

Step3: Determine Proton Count

Since atomic number = number of protons, Beryllium has 4 protons.

Answer:

B. 4 (assuming the option with "4" is the correct one; from the options, the second option with "4" is correct)