Brainscape's Knowledge GenomeTM

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


See full index

Year 9 Science > C1- Atomic structure > Flashcards

C1- Atomic structure Flashcards

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

What is the smallest part of an element that can exist?

A

An atom

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

How many different elements are there?

A

About 100

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

How are compounds formed?

A

From chemical reactions where bonds are broken and then reformed.

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

What is a substance made of only one type of atom?

A

An element

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

How many letters are there in a chemical symbol?

A

One or two depending on the element.

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

What are all substances made from?

A

Atoms

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

What is involved in a chemical reaction?

A

The formation of one or more new substances and usually an energy change.

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

What is an atom?

A

The smallest part of an element that can exist.

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

Where do we find all the different elements?

A

On the periodic table.

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

What is an element?

A

A substance made of only one type of atom.

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

What are the 3 forms that substances can exist in?

A

Elements Compounds Mixtures

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

Does separating a mixture involve a chemical reaction? Explain.

A

No, it doesn’t involve a chemical reaction because no chemical bonds are being made or broken.

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

What is a mixture

A

A substance made of more than one element or compound not chemically bonded together.

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

What is a molecule?

A

A substance made of more than one atom chemically bonded together. Can be the same element or differnt elements

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

What is a substance made from two or more different atoms chemically bonded together?

A

A compound.

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

How can mixtures be separated? (5)

A

Filtration, crystallization, simple distillation, fractional distillation, chromatography

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

What is Dalton’s model of the atom?

A

Atoms as solid spheres that could not be divided into smaller parts

18
Q

Who believed that atoms were solid spheres that could not be divided into smaller parts?

A

Dalton

19
Q

What is the plum pudding model of the atom?

A

Sphere of positive charge with negative electrons embedded in it

20
Q

What model of the atom is a sphere of positive charge with negative electrons embedded in it?

A

The plum pudding model.

21
Q

What did scientists discover in the alpha particle scattering experiment?

A

Some alpha particles were deflected but he gold foil. This showed that an atom’s mass and positive charge must be concentrated in one small space

22
Q

What did the scientists observe in the alpha scattering experiment?

A

That the alpha particles did not go straight thought the foil but were deflected.

23
Q

What was the conclusion from the alpha scattering experiment?

A

That the atom’s mass and positive charge must be concentrated in one small area

24
Q

Describe the nuclear model of the atom

A

Dense nucleus with electrons orbiting it

25
Q

What did Niels Bohr discover?

A

Electrons orbit in fixed energy levels (or shells)

26
Q

What’s another name for electron shells?

A

Energy levels

27
Q

What’s another name for electron shells?

A

Energy levels

28
Q

What did James Chadwick discover?

A

uncharged particle called neutrons

29
Q

Who discovered electron shells?

A

Neils Bohr

30
Q

Who discovered neutrons?

A

James Chadwick

31
Q

Where are protons and neutrons found in the atom?

A

In the nucleus

32
Q

What subatomic particles are found in the nucleus?

A

Protons and neutrons

33
Q

What is the relative mass of a proton?

A

1

34
Q

What is the relative mass of a neutron?

A

1

35
Q

What is the relative mass of an electron?

A

0 (or very very small)

36
Q

What subatomic particles have a relative mass of 1?

A

Protons and neutrons

37
Q

What is the charge of an electron?

A

Negative 1

38
Q

What is the charge of a proton?

A

Positive 1

39
Q

What is the charge of a neutron?

A

Neutral

40
Q

What subatomic particle has a neutral charge?

A

Neutron

41
Q

What subatomic particle has a charge of positive 1?

A

Proton

Year 9 Science (3 decks)

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