3. Atomic number/mass/electrons Review

What does the atomic number of an element represent?

• Total mass of the element

• Number of protons

• Number of electrons

• Number of neutrons

How do you calculate the number of neutrons in an isotope?

• Subtract electrons from protons

• Add protons and electrons

• Add atomic number to mass number

• Subtract atomic number from mass number

What is the symbol for Silver in the periodic table?

• Ag

• Au

• Si

• S

If an element has an atomic number of 19 and a mass number of 39, how many neutrons does it have?

• 20

• 19

• 18

• 39

What element has the symbol 'F' and what is its atomic number?

• Fermium, 100

• Fluorine, 9

• Iron, 26

• Francium, 87