Brainscape's Knowledge GenomeTM

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


See full index

N5 > chem > Flashcards

chem Flashcards

1
Q

How do you increase the rate of reaction?

A

increase tempature, increase surface area, increase concentration, add a catalyst

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

What are the properties of a catalyst?

A

increases the rate of reaction without being used up and can be recovered while being completly unchanged

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

why are catalysts used in industry

A

because they allow reactions to take place at lower temputures which saves money and energy

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

how do you monitor the rate of a insoluble reaction

A

flask with topper on it with a pipe going through to a mesuring cylinder with water in it

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

how do you monitor the rate of a soluble reaction

A

flask with topper on it and a pipe going through the topper to a gas syringe

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

what is the endpoint of a reaction

A

where the line goes flat

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

what does the endpoint on a graph show

A

the reaction has stopped

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

how do you find the rate of reaction

A

change in quantity divided by change in time

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

what is inside the nucleus

A

protons and neutrons

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

what is the charge and mass of a neutron

A

no charge with a mass of 1 amu

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

what is the charge and mass of a proton

A

positive with a mass of 1 amu

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

what is the charge and mass of an electron

A

negative with a mass of 0 amu

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

where can you find the atomic number

A

in the perodic table on top of each element

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

what does the atomic number tell you

A

the number of protons

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

what is the mass number

A

the number of protons plus neutrons

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

what does the nuclide notation show you

A

the mass number and the atomic number

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

why must the number of electrons and protons in an atom be the same

A

becuase atoms have to have a neutral charge

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

what is an isotope

A

isotopes are atoms with the saem atomic number but different mass number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what does RAM stand for

A

relative atomic mass

20
Q

when are ions formed

A

when an atom gains or losses electron

21
Q

what happens when an atom doesnt have an equal number of protons to electrons

A

an ion is formed

22
Q

why do metal atoms lose electrons

A

to form a posative ion

23
Q

why do non-metal atoms gain electrons

A

to form a negative ion and make a strong outer shell of 8 electrons

24
Q

what is a molecule

A

a molecule is made up of 2 or more atoms bonded together via covalent bonding, a molecule is typically made up of non-metal atoms only.

25
Q

what is a covalent bond

A

a covalent bond is a shared pair of electrons between two non-metals

26
Q

how are the atoms in a molecule held together

A

electrostatic force of attraction between the positive nuclei of the atom and the negatively charged electrons

27
Q

what is linear

A

one bond

28
Q

what is angular

A

two bonds

29
Q

what is pyramidal

A

three bonds

30
Q

what is tetrahedral

A

four bonds

31
Q

what is an ionic bond

A

the electrostatic force of attraction between a posative metal ion and a negative non-metal ion

32
Q

what type of bond is formed between two non-metals

A

covalent

33
Q

what type of bond is formed between a non-metal and a metal

A

ionic

34
Q

what are the properties of an ionic compounds

A

they have high melting points and boiling points they can also conduct electricity ONLY when molten or in solution

35
Q

why can ionic compounds

A

becuase then the ions are free to move

36
Q

what are the properties of covalent network substances

A

they have very high melting and boiling points, they are insoluble in water, they do NOT conduct electricity with the exeption of graphite becuase of its delocalised electrons

37
Q

what are the properties of covalent molecular substances

A

they have strong covalent bonds within molecules but weak forces of attraction between molecules, they have low melting and boiling points and they do NOT conduct electricity with the exception of water

38
Q

this substance has a low boiling and melting point but doesnt conduct electricity, what type of bonding is this

A

covalent molecular

39
Q

this substance has a very high boiling and melting point but doesnt conduct electricity, what type of bonding is this

A

covalent network

40
Q

this compound has high boiling and melting points and can only conduct when molten or in solution, what type of bonding is this

A

ionic

41
Q

this compound can only conduct when molten or in solution, what type of bonding is this

A

ionic

42
Q

what are delocalized electrons

A

electrons which are free to move

43
Q

what does it mean if a compounds name ends with “-ide”

A

the compound only contains these two elements

44
Q

what does it mean if a compounds name ends with “-ate” or “-ite”

A

the compound is made up of three or more elements

45
Q

what is valency

A

valency is the number of bonds that an element can form

46
Q
A

N5 (3 decks)

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