Atom Structure

Question 1

What are the 3 subatomic particles that make up each atom?

Answer 1

-protons (p+)
-neutrons (n)
-electrons (e-)

Question 2

where does each of the 3 subatomic particles go on the atom?

Answer 2

-protons and neutrons make up the nucleus (make up the whole mass of the atom)
-electrons found along the outside of the nucleus (make up no mass of the atom)

Question 3

In the structure of an atom, how many electrons can each level hold?

Answer 3

-the lowest level can hold 2 e-
-the second level can hold 8 e-
-the third level can hold 8 e- and so on

Question 4

True or False: energy levels can be empty, partly filled, or completely filled

Answer 4

True!

Question 5

What is the atomic #?

Answer 5

indicates the # of protons an atom has

Question 6

What is the mass #?

Answer 6

integer equal to the total # of protons and neutrons

Question 7

What is the atomic molar mass?

Answer 7

the average mass of the elements isotopes

Question 8

what are isotopes?

Answer 8

atoms of the same elements can have different #’s of neutrons; the different possible versions of each element are called isotopes.

Question 9

what are valence electrons?

Answer 9

Electrons in the outer energy level of the atom

Question 10

What is the relationship between the group # and the # of valence electrons?

Answer 10

They always add up to the same #.
Ex: group 4 = a total of 4e-

Question 11

What is the relationship between the period # and the # of energy levels?

Answer 11

They are the same —> the # of the period is the amount of energy levels