Gen Chem Exam #2

Front 1

The smallest substance is called_____ which is the Greek word for indivisible.

Back 1

Atom

Front 2

Atoms are surrounded by a positively charged _______ and negatively charged _________

Back 2

Nucleus
Electrons

Front 3

The nucleus contains protons and neutrons that are much ________ than the e-

Back 3

Heavier

Front 4

When an element is radioactive, it means that it loses particles from its nucleus and transforms into a different element called _________decay.

Back 4

Radioactive

Front 5

Atomic mass is the ________ mass of all ________ of an element in atomic mass units.____

Back 5

Average
Isotopes

Front 6

_________ distinguishes one element from another

Back 6

Protons

Front 7

The e- was discovered by _______.

Back 7

jJ Thompson

Front 8

JJ Thompson found a glow made of negatively charged particles called______.

Back 8

E-

Front 9

He found them to be incredibly small thinking they were stuck like negative plums in a ________ pudding.

Back 9

Positive

Front 10

Ernest Rutherford's experiment showed that protons and neutrons were packed __________ together in the _______ of the atom, making an important discovery of the _______.

Back 10

Tightly
Center
Nucleus

Front 11

Rutherford fired _________ particles and discovered that p and n must be packed together in the nucleus while the _____ are found in the space around it.

Back 11

Alpha
E-

Front 12

When 2 atoms come together it's their ______ that come into contact with each other

Back 12

E-

Front 13

________ changes involve the e- not the nucleus

Back 13

Chemical

Front 14

Max Planck discovered that energy was released in packets called _______?

Back 14

Quanta

Front 15

Bohr observed that e- within atoms could take on certain ________

Back 15

Energies

Front 16

Bohr proposed that e- were arranged in energy levels or ____[[ and that e- with the same _______ are in the same shell.

Back 16

Shell
Energy

Front 17

The higher the shell the higher the _______

Back 17

Energy

Front 18

S can hold ______
P can hold _______
D can hold ______

Back 18

2
6
10

Front 19

The _______ energy levels are filled first

Back 19

Lower

Front 20

The first two columns are called the _____ block.

Back 20

S

Front 21

Transitions elements are called the ______ block.

Back 21

D

Front 22

13-18 are called the _______ block

Back 22

P

Front 23

Lanthanides and actinides are called the _____ block

Back 23

F

Front 24

The outermost shell are called _______ and determines how an element will react.

Back 24

Valence e-

Front 25

Column 1 has ______ easily lost e-

Back 25

1

Front 26

It's impossible to determine the velocity and exact position of _____ .= heisenbergs uncertainty principle.

Back 26

E-

Front 27

Periodic table is organized by _________

Back 27

Atomic # (# of protons)

Front 28

Horizontal rows are called

Back 28

Groups (1-18)

Front 29

Vertical columns are called

Back 29

Periods (1-7)

Front 30

What are the 3 classes of elements?

Back 30

Metals
Non-metals
Metalloids

Front 31

Mass # on ______
Atomic # ______

Back 31

Top
Bottom

Front 32

What info is provided by the atomic #?

Back 32

Electrons

Front 33

What info is provided by the mass number?

Back 33

# of protons and neutrons

Front 34

What are isotopes?

Back 34

Atoms of the same element that can have different masses and #'s of neutrons.

Front 35

What is MAN?

Back 35

Mass # - atomic # = # of n

Front 36

What are ions?

Back 36

Atoms that have a positive(cations) or negative(anions) charge by gaining or losing e-

Front 37

Metals

Back 37

Solid, have luster, electrical conductors

Front 38

Non metals

Back 38

Brittle, non lustrous, poor conductors

Front 39

Metalloids

Back 39

Properties of both metals and non metals

Front 40

What are valence e-?

Back 40

E- in the outermost shell, responsible for reactions

Front 41

Elements in the same group have similar?

Back 41

Valence e-
Chemical properties
Charge
E- configuration

Front 42

When light is emitted by an atom, what change was occurred within the atom?

Back 42

Excited to ground state

Front 43

When an electron in an atom absorbs a photon or quantum of energy, what happens to the electron?

Back 43

Excited to ground state, releases energy

Front 44

What is the octet rule?

Back 44

8 e-
Stable

Front 45

Groups 1,2 and 13 tend to form ______ ions. groups 15,16,17 tend to form_______ ions.

Back 45

Positive
negative

Front 46

What are the parts of an atom?

Back 46

Protons
electron
Neutron

Front 47

Isotope

Back 47

Same # of protons
Different # of neutrons

Front 48

Where are parts of an atom located?

Back 48

P and n = nucleus
E- = energy levels

Front 49

What is the ground state?

Back 49

When all of the e- are at the lowest possible energy level

Front 50

What happens when an e- absorbs a photon of just the right amount of energy to move it to a higher quantum shell, is an example of ______

Back 50

Excited state

Front 51

When atoms are heated or energized with electricity their e- can gain energy. This is in the _______

Back 51

Excited state

Front 52

How do electrons emit light?

Back 52

When e- lose energy they emit a photon of light

Front 53

What are photons?

Back 53

They are particles with energy but no mass.