Atomic Structure

Question 1

Atom

Answer 1

the smallest particle of an element

Question 2

3 subatomic particles

Answer 2

protons, electrons, and neutrons

Question 3

Nucleon

Answer 3

any particle found in the nucleus (protons + neutrons)

Question 4

protons

Answer 4

have a mass of 1 a.m.u - found in the nucleus

Question 5

Atomic Number (nuclear charge)

Answer 5

equal to the number of protons

Question 6

Neutrons

Answer 6

particles located in the nucleus (mass of 1 a.m.u) - neutral charge

Question 7

Mass number

Answer 7

the total number of protons and neutrons in an atom (always a whole number)

Question 8

electron

Answer 8

particles that revolve/rotate around the nucleus (mass = 0) negative charge

Question 9

of neutrons

Answer 9

mass number - # of protons

Question 10

which particle accounts for most of the mass of an atom

Answer 10

Protons and neutrons

Question 11

In a sample of pure copper, all atoms have atomic numbers which are

Answer 11

All atoms have same atomic number because number of electrons in all atoms are same.

Question 12

All samples of an element are composed of atoms with the same

Answer 12

atomic number

Question 13

isotopes

Answer 13

atoms of the same element that have the same # of protons, but a different number of neutrons