Respuesta :

cottonbyte

Answer:

Calcium = 20 protons

Gold = 79 protons

Copper = 29 protons

Iron = 26 protons

Explanation:

Atomic Number = #protons and neutrons

Calcium (Ca)

Atomic Number: 20

Protons: 20

Gold (Au)

Atomic Number: 79

Protons: 79

Copper (Cu)

Atomic Number: 29

Protons: 29

Iron (Fe)

Atomic Number: 26

Protons: 26