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P.3 Science > Chemistry End Untit Test > Flashcards

Chemistry End Untit Test Flashcards

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0
Q

Explain condensation on cold glass in summer

A

Particles strengthen and heat is removed from water in the air

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1
Q

What are the 5 parts of the particle theory?

A

Everything is made of particles
All particles of 1 substance are the same
Spaces between particles are large compared to the particle itself
Particles are always moving
Attracting forces between particles

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2
Q

What r the 3 states of matter

A

Solid
Liquid
Gas

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3
Q

What r the 6 changes of state?

A

Deposition
Melting. Evaporating
◼️

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4
Q

What r the 2 types of particles

A

Atoms

Molecules

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5
Q

What is an atom

A

Another word for element

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6
Q

Give an example of an element molecule

A

Hydrogen gas
Oxygen gas
Ect

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7
Q

What’s a compound molecule

A

More than 1 type of atom

Ex water

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8
Q

Define pure substance

A

Only contains 1 kind of particle

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9
Q

Define mixture

A

More than 1 kind of particle

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10
Q

What’s a homogeneous mixture

A

Different particles
Can’t see difference
Ex apple juice

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11
Q

What is a heterogenous mixture

A

Can visually see difference

Ex chocolate chip cookies

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12
Q

What r the 3 common gasses

A

H2
O2
CO2

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13
Q

Describe the 3 common gasses

A

H2 is explosive
O2 is essential to life
CO2 is used to extinguish fires and plant need it for photosynthesis

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14
Q

Count the atoms

2 Mg3 (PO4)2

A

Mg - 6
P - 4
O - 16

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15
Q

What r the 2 types of physical properties

A

Qualitative

Quantitative

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16
Q

Name 4 qualitative and quantitative properties

A

Ductility, malatibility, viscosity, lustre ect

Melting pt., boiling pt., mass, density

17
Q

What r the 2 types of chem properties

A

Reaction with acid

Combustibility

18
Q

What evidence proves physical change

A

Change in state

Distillation ex sugar + water

19
Q

What evidence proves chem change

A

Heat and light is given off
Gas bubbles given off without adding heat
Precipitate
New permanent colour/scent

20
Q

What is a proton

A

Positive
Atomic #
In nucleus

21
Q

What’s an electron

A

Negative
Virtually no mass
In orbit

22
Q

What is a neutron

A

0 charge
Atomic mass - atomic #
In nucleus

23
Q

How many electrons can be on each orbital ring as far as we need to know for gr 9

A

Orbit 1 2
Orbit 2. 8
Orbit 3. 8
Orbit 4. 2

24
Q

How does standard atomic notation work

A

Element symbol in middle
Mass on top
Atomic number on bottom

25
Q

Due to isotopes what # may change

A

The atomic mass

26
Q

Who created the first model of the atom

A

John dalton

27
Q

What did john Dalton think the atom looked like

A

Spheres that were all different colours and sizes

28
Q

What were the 4 things john dalton thought.

A

All matter is made of atoms
Each element has its own kind of atoms
Different elements combine to form compounds
Atoms cannot be created, distroyed, or subdivided

29
Q

Who came up with the plum pudding model?

A

J.J. Thompson

30
Q

Who discovered electrons

A

J.J Thompson

31
Q

What did J.J Thompson assume

A

The rest of the atom was positively charged

32
Q

Who conducted the gold foil experiment

A

Ernest Rutherford

33
Q

What did Ernest rutherford’s model of the atom look like

A

All protons in the nucleus and electrons around the outside

34
Q

What 2 things did Rutherford think after doing the gold foil experiment

A

Atom has tiny dense nucleus that has positive charge

Nucleus is surrounded by empty space containing rapidly moving electrons

35
Q

Who came up with the planetary model of the atom

A

Niels Bohr

36
Q

What did Niels Bohr think about the atom

A

Electron move in circular paths called orbits around the nucleus
The further away the electron is from the nucleus the greater it’s energy
Electrons are more stable the closer they r to the nucleus

37
Q

What kind of atom do we use now

A

Bohr-Rutherford model

38
Q

How does the Bohr-Rutherford model of an atom work

A 
# of protons in nucleus is the atomic #
The # of neutrons in nucleus is atomic # - atomic mass
# of electrons in orbit is the atomic #
39
Q

What happened in the gold foil experiment?

A

Alpha particles were shot at gold foil

P.3 Science (4 decks)

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