atomic structure and the periodic table

Which TWO of the following are classified as elements?

• blood

• cookies

• H2O (Water)

• O2 (oxygen)

• N2 (nitrogen)

What element is in group 2 and period 5?

• Rubidium

• Strontium

• Phosphorus

• Vanadium

Which TWO of the following are located in the nucleus of the atom?

• Energy levels

• energy orbitals

• neutron

• proton

If an atom has 18 protons and 22 neutrons, what is the atomic mass?

• 4

• 18

• 22

• 40

If an atom has 19 protons and 20 neutrons, what is the atomic number?

• 1

• 19

• 20

• 39

Which THREE statements best describe this Bohr Model?

• The mass number is 4 and the atomic number is 2.

• The mass number is 2 and the atomic number is 4.

•  This element has 2 valence electrons.

• This element has a full energy level.

• This element has an unfilled energy level.

How many neutrons does Beryllium have

• 13

• 9

• 13

• 5

What is the smallest particle of the element gold (Au) that can still be classified as gold?

• atom

• proton

• molecule

• neutron

What type of charge does the nucleus of an atom have?

• Neutral

• Positive

• Negative

• none of these

Which subatomic particle has the least mass?

• proton

• neutron

• electron

• atom