Question

which element has 55 protons? *
2 points
periodic table of the elements
caesium (cs)
silicon (si)
neon (ne)
silver (ag)

Explanation:

The atomic number of an element is equal to the number of protons in its nucleus. Looking at the periodic table, Caesium (Cs) has an atomic number of 55, which means it has 55 protons. Silicon (Si) has an atomic number of 14, Neon (Ne) has an atomic number of 10, and Silver (Ag) has an atomic number of 47.

Answer:

Caesium (Cs)