Pg 5-20

Question 1

What is matter?

Answer 1

anything that has mass & takes up space

ex air

Question 2

Techniques to separate matter?

Answer 2

Mechanical, settling, flotation, filtration, extraction, crystallization, chromatography

Question 3

The number of protons in the nucleus of one atom of an element is?

a) always greater than the number of neutrons

b)less than the number of electrons

c)always equal to the number of neutrons

d) the atomic number

Answer 3

d) the atomic number

Question 4

Elements that react strongly with water and are very soft metals are part of the family called

Halogens, transition metals, noble gases or alkali metals?

Answer 4

Alkali metals

Question 5

What classification cases fatal or toxic effects when exposure occurs?

Answer 5

Skull and cross bones

Question 6

The number of neutrons found in sulfur-34 is?

Answer 6

18

Question 7

Which element is found in Group #17 and Period #3?
Question options:

scandium

fluorine

bromine

chlorine

Answer 7

Chlorine

Question 8

When phosphorous chemically combines with another element to form an ion, the phosphide ion will have an overall charge of:
Question options:

+3

-3

-1

-2

Answer 8

-3

Question 9

The sum of the protons and neutrons in the nucleus of an atom of an element is the?

Mass number , isotope , atomic number or nucleus

Answer 9

Mass number

Question 10

The atomic number for gold is:

196.97
47
107.87
79

Answer 10

79

Question 11

The number of electrons in O2- ion is?
10
6
18
8

Answer 11

10

Question 12

Elements that have the same atomic number but different mass numbers are?

ions

isotopes

electrons

protons

Answer 12

Isotopes

Question 13

J.J. Thomson is credited with the discovery of the electron.
Question options:
True
False

Answer 13

True

Question 14

The modern theory of the atom states that electrons are located in stationary orbitals around the nucleus and are not free to move around.
Question options:
True
False

Answer 14

False

Question 15

The atomic number of aluminum-27 is?
3
27
14
13

Answer 15

13

Question 16

First level can hold how many electrons____

Second level can hold _____

Third level can hold ____

Answer 16

2,8,8

Question 17

What is a stable octet

Answer 17

Arrangement of eight electrons in the outermost occupied energy level

Question 18

Is anion negative or positive?

Answer 18

Negative

Question 19

Are Cations negative or positive

Answer 19

Positive

Question 20

Atomic number ?

Answer 20

Number of protons in an atoms nucleus

Question 21

Mass number?

Answer 21

Sum of the number of protons and neutrons in a atoms nucleus

Question 22

What group are halogens ?

Answer 22

17

Question 23

Heterogeneous?

Answer 23

Diff components visible n u can separate them

Question 24

What did jj Thomson find?

Answer 24

Discovered that negatively charged particles are called electrons created the plume pudding model

Question 25

Groups are vertical or horizontal?

Answer 25

Vertical columns

Question 26

What family is magnesium in?

Alkaline earth metals
Halogens
Noble gases
Alkali metals

Answer 26

Alkaline earth metals

Question 27

What is valence energy

Answer 27

Outermost occupied energy level of an atom

Question 28

Valence electrons

Answer 28

Electrons in the valence energy level