Brainscape's Knowledge GenomeTM

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


See full index

Chemistry Nat5 > Unit 1 > Flashcards

Unit 1 Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

What is a covalent bond?

A

A covalent bond is a shared pair of electrons between 2 non metal atoms.

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

What does an atom contain in the nucleus?

A

protons and neutrons

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

What is an isotope?

A

Same atomic number, different mass number

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

What is the shape of a molecule with the formula CH4

A

Tetrahedral

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

Is Hydrogen a diatomic molecule?

A

Yes-along with oxygen, nitrogen, fluorine, chlorine, bromine and iodine

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

What is a catalyst?

A

A catalyst is a substance that speeds up a chemical reaction whilst remaining unchanged

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

How do you find the mass number?

A

number of protons + number of electrons

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

What is the charge of an electron?

A

An electron is negative

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

What is the mass of a proton?

A

1 amu

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

How do you increase the rate of a chemical reaction?

A

Increase the temperature, add a catalyst, decrease surface area

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

What is the unit for concentration?

A

mol l-1 s-1

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

How many electrons does the second electron shell hold?

A

8 electrons

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

What shape does the third electron shell have?

A

Tetrahedral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why do atoms create covalent bonds?

A

To create a steady electron arrangement

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

What number does the prefix ‘penta’ stand for?

A

5

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

Do metal ions lose or gain electron(s)?

A

Metal Ions loose outer electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

T/F- Ions are charged

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

T/F- atom have unequal amounts of protons and electrons

A

False- atoms have equal amounts of protons and electrons

19
Q

What element is Mg?

A

Magnesium

20
Q

What is the formula for the mole?

A

m= GFM x n

21
Q

Does covalent molecular have high or low melting/boiling points?

A

Low

22
Q

What does delocalised mean?

A

Delocalised means that the outer electrons are free to move about

23
Q

Do metals conduct electricity?

A

Yes

24
Q

Do covalent solutions conduct electricity?

A

They do not conduct electricity as they do not have any charged particles.

25
Q

What is the formula for concentration?

A

c= n/v

26
Q

How do you work out the percentage of an element present in a compound?

A

% by mass= m/GFM x 100

27
Q

What is the formula for sulfuric acid?

A

H2SO3

28
Q

Do acids have a pH greater than, equal to or less than 7?

A

Acids have a pH less that 7

29
Q

Do acids contain more or less hydrogen ions that hydroxide ions?

A

Acids contains more hydrogen ions than hydroxide

30
Q

What happens when you add a base to an acid?

A

Neutralisation

31
Q

What is the definition of neutralisation?

A

A reaction that moves the pH towards 7.

32
Q

What is a soluble metal oxide?

A

An alkali

33
Q

If an acid contains ‘sulfuric’ in its name, what does the salt name end in?

A

Sulfate

34
Q

What is a precipitate?

A

An insoluble soild

35
Q

What is the formula for a volumetric tritation?

A

C1V1/N1 = C2V2/N2

36
Q

What is a spectator ion?

A

An ion which is present in a reaction but doesn’t take part.

37
Q

What group is the halogens?

A

Group 7

38
Q

What group is the noble gases?

A

Group 0/8

39
Q

What group is the Alkali metals?

A

Group 1

40
Q

What is the formula for reaction rate?

A

Rate= (change in) Quantity/(change in) Time

41
Q

What is an indicator that a chemical reaction has taken place?

A

A colour change/ a gas given off/ a solid forming/ energy change

42
Q

Do ionic compounds conduct?

A

They do not conduct because the ions are not free to move

43
Q

Do metallic compounds conduct?

A

They conduct all of the time

Chemistry Nat5 (1 decks)

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