bohr model and valence electrons

Which subatomic particle identifies an element?

• Proton

• Neutron

• Electron

• Nucleus

How many protons are in an atom of Phosphorus, P?

• 30

• 15

• 16

• 31

The period number tells you:

• How many protons

• How many neutrons

• Number of energy levels

• Number of valence electrons

How many energy levels are in an atom of aluminum, Al?

• 1

• 3

• 4

• 2

How many valence electrons are in this element?

• 7

• 6

• 5

• 2

What is the name of this element?

• Calcium

• Helium

• Lithium

• Boron

Which element has the same number of electrons in the outer energy level as Oxygen?

• Boron, B

• Carbon, C

• Neon, Ne

• Sulfur, S

How many valence electrons does this element have?

• 3

• 4

• 2

• 1

What are valence electrons

• The outer most electrons

• The inner most electrons

• The 2nd and 3rd electron to be added to the orbital

• The electrons that are pulled off due to frcition

In borhs model, Orbitals are also known as

• Elliptical

• Circles

• Energy levels

• not fixed motion