Bohr Models Quiz

Which feature of Bohr's model prevents electrons from spiraling into the nucleus?

• Electrons are locked in orbitals

• Electrons are repelled by the nucleus

• Electrons have no charge

• Electrons are stationary

How many energy levels are known according to current knowledge?

• Seven

• Eight

• Six

• Five

What is the maximum number of electrons that can fit in the second energy level?

• Eight

• Six

• Four

• Two

What is the atomic number of an element indicative of?

• Number of valence electrons

• Number of neutrons

• Number of protons

• Number of energy levels

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

• Multiply atomic number by mass number

• Divide mass number by atomic number

• Subtract atomic number from mass number

• Add atomic number and mass number

What is the symbol for potassium on the periodic table?

• Po

• Pt

• K

• P

How many protons does potassium have?

• 20

• 18

• 21

• 19

In which period of the periodic table is potassium found?

• Second

• Third

• Fourth

• Fifth

How many energy levels does potassium have?

• Five

• Four

• Three

• Two

What is the mass number of potassium when rounded to the nearest whole number?

• 41

• 40

• 39

• 38