atoms review quick check

What subatomic particle always determines the identity of an atom?

• neutron

• proton

• electron

• valence electron

Check all of the things that are true about an electron

• they have a neutral charge

• they are located in the electron cloud

• they have almost no mass

• they are smaller then protons and neutrons

• they are located in nucleus

What is the mass of the atom above?

• 10

• 3

• 7

• 4

Using your periodic table, what is the identity of the atom above?

• Ca (calcium)

• O (Oxygen)

• Ne (Neon)

• He (Helium)

Which answer choice correctly shows the number of subatomic particles for Beryllium?

• protons = 4

  electrons = 4

  neutrons = 4

• protons = 4

  electrons = 5

  neutrons = 4

• protons = 4

  electrons = 4

  neutrons = 9

• protons = 4

  electrons = 5

  neutrons = 5

• protons = 4

  electrons = 4

  neutrons = 5

what's the atomic number of the atom above?

• 20

• 19

• 1

• 39

• 4

which statements are true for a proton?

• always same as atomic number

• always determines identity

• have a negative charge

• located in nucleus

• have almost no mass

Which statements are true about a neutron?

• have almost no mass

• have a neutral charge

• located in the nucleus

• always the same as the atomic number

• have a negative charge

how many valence electrons are there in an atom of Na (sodium)?

• 2

• 8

• 1

• 11

What is the identity of the atom above?

• C (carbon)

• B (boron)

• Na (sodium)

• H (hydrogen)