Unit 2

Question 1

Atom

Answer 1

The smallest piece of an element, no charge/neutral

Question 2

Proton

Answer 2

+ charge, in nucleus, identifies the element, part of mass

Question 3

Neutron

Answer 3

0 charge, in nucleus, part of mass, change creates isotopes

Question 4

Electron

Answer 4

• charge, in energy level/rings, change creates ions

Question 5

Nucleus

Answer 5

Center of atom, contains p+ & n0, mass of atom

Question 6

Atomic Number

Answer 6

Number of p+, top number in P.T, bottom number in nuclear symbol

Question 7

Average Atomic Mass

Answer 7

Average of all isotopes of an element, decimal bottom number in P.T

Question 8

Mass Number

Answer 8

p+ and n0, rounded average from P.T, top # in nuclear symbol

Question 9

Ion

Answer 9

Atom with + or - charge, more (-) or less (+) e-

Question 10

Isotope

Answer 10

Same element w/diff number if n0 and different mass

Question 11

How to find the mass # of an atom

Answer 11

p+ + n0, round decimal in P.T

Question 12

How to find the charge on an ion

Answer 12

p+ - e-

Question 13

Energy Level

Answer 13

“Rings” around nucleus where e- are (2,8,18)

Question 14

Photon

Answer 14

“Packet” of energy given off by e- as light

Question 15

Color= Visible spectrum, ROYGBIV, caused by:

Answer 15

e- jumping and falling from excited state back to ground state and releasing energy (photons)