Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science 9 > unit 1 review > Flashcards

unit 1 review Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

list the kinetic molecular theory (4)

A
  • all matter is made up of very small particles.
  • there is empty space between particles.
  • particles are constantly moving.
  • energy makes particles move.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is physical property?

A

it is when matter’s appearance may change but no chemical bonds are broken or made

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are subatomic particles that make up atom?

A

electrons, protons, and neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

where is each kind of particle located in an atom?

A

protons and neutrons are located in the nucleus, while electrons are around the nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

where is most of the mass of an atom located?

A

nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what part of an atom makes up most of the volume?

A

around the nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is an element?

A

an element can’t be broken down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

approximately how many different elements have been identified?

A

about 92 are natural, 115+ are with machines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

(periodic table) what is another name for row?

A

period

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

(periodic table) what is another name for group?

A

family

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what do elements in the same column of the periodic table have in common?

A

they tend to share the similar physical and chemical properties

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are the names of two families of metals in the periodic table?

A

alkali (1) and

alkaline (2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what are the names of two families of non-metals in the periodic table?

A 
halogens (17) and 
noble gases (18)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is a valence electron?

A

valence electron is an electron in the outer shell of an atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

how many valence electrons are in elements belonging to the alkali metal family?

A

one

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

why are noble gases very stable?

A

noble gases are unique because their valence shell is full

17
Q

what is a compound?

A

a compound is a pure substance made up of two or more elements that have been chemically combined.

18
Q

what kind of compound involves the attraction of oppositely charged ions

A

ionic compounds

19
Q

what kind of compound involves atoms sharing a pair of electrons

A

covalent compound

20
Q

what is a polyatomic ion?

A

it is a molecular ion composed of more than one type of atom joined by covalent bonds

21
Q

what are the two kinds of ions in an ionic compound made from only two elements?

A

a positive metal ion and a negative non-metal ion

22
Q

what is chemical change?

A

old chemical bonds are broken and new ones are formed which produces new substance with new properties

23
Q

what is physical change?

A

there is no breaking or forming of bonds and a new material is not formed.

24
Q

what is exothermic reaction?

A

energy is released

25
Q

what is endothermic reaction

A

energy is consumed

26
Q

what chemical family is composed of elements with full valence shells?

A

noble gases

Science 9 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions