Question

in the periodic table, which of the highlighted elements has the greatest number of protons?
a calcium, ca
b iron, fe
c aluminum, al
d fluorine, f

Explanation:

Step1: Recall atomic - number is number of protons

The number of protons in an atom is equal to its atomic number.

Step2: Find atomic numbers of elements

Calcium (Ca) has an atomic number of 20. Iron (Fe) has an atomic number of 26. Aluminum (Al) has an atomic number of 13. Fluorine (F) has an atomic number of 9.

Step3: Compare atomic numbers

Comparing 20, 26, 13, and 9, we find that 26 is the largest.

Answer:

B. Iron, Fe