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Grade 9 Chemistry > Grade 9 chemistry > Flashcards

Grade 9 chemistry Flashcards

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1
Q

A pure substance can be made up of any number of different kinds of particles (T/F)

A

False

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2
Q

Describing natural gas as being a colourless and stinky gas would describe its physical properties(T/F)

A

True

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3
Q

Matter is anything that has mass and takes up space

A

True

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4
Q

Particles in a solid have more motion than particles in a liquid

A

False

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5
Q

Solutions are uniform mixtures where the substances making up the solution can be distinguished

A

False

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6
Q

The ability for something to burn is a chemical property

A

True

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7
Q

Ductility

A

ability of a substance to be pulled into a finer strand

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8
Q

Each element is given a certain symbol. What is an element symbol?

A

An abbreviation used for an element that is recognized world wide

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9
Q

Person who performed the gold foil experiment and proposed that an atom has a positively charged nucleus

A

Ernest Rutherford

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10
Q

Electron

A

Negatively charged particle in an atom

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11
Q

Proton

A

Positively charged particle in an atom

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12
Q

Neutron

A

Neutrally charged particle in an atom

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13
Q

Which group of elements are almost all solids, good conductors and ductile

A

Metals

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14
Q

Which family of elements are stable and unreactive?

A

Noble Gases

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15
Q

Number of protons in an atom

A

Atomic number

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16
Q

James Chadwick discovered this

A

Neutron

17
Q

Number of protons and neutrons in an atom’s nucleus

A

Mass number

18
Q

Name given to the electron in the outer most orbit

A

Valence

19
Q

Name given to a row in the periodic table

A

Period

20
Q

What is a mixture

A

A substance that is made up of at least 2 different variations of particles

21
Q

Qualitative properties

A

A property that you can’t really measure and does not have a numeric value

22
Q

Quantitative Properties

A

A property of a substance that is measured and has a numerical value

23
Q

Chemical Properties

A

A characteristic of a substance that describes its ability to change its composition to produce one or more new substances

24
Q

Physical Properties

A

A characteristic of a substance that can be determined without changing the composition of that substance

25
Q

Malleability

A

the ability of substance to be bent, hammered, changed in form

26
Q

Viscosity

A

the flow rate of a substance, has to do with how thick something is

27
Q

Transparency

A

how clear a substance is, how much you can see through the substance

28
Q

Metal

A

A compound that is lustrous, ductile and can conduct heat and electricity, Copper, iron, aluminum

29
Q

Nonmetal

A

an element, usually a gas or a dull powdery solid that does not conduct heat or electricity, Example oxygen, carbon, sulphur

30
Q

Compound

A

a pure substance composed of 2 or more different elements that are chemically joined

31
Q

Element

A

a pure substance that cannot be broken down

32
Q

Number of electrons does an atom have if it has 19 protons

How many neutrons does it have if the mass number is 40,

A

19 electrons, if mass number is 40 it has 21 neutrons,

33
Q

What are the three subatomic particles?

A

Proton, neutron and electron

34
Q

What is a cation

A

A positively charged ion

35
Q

What is an anion

A

A negatively charged ion

36
Q

Name four scientists that affected the particle theory

A

Ernest Rutherford, john dalton,JJ Thomson and Niels Bohr

37
Q

How many atoms build up C6 H12 O6

A

24

38
Q

How are valence electrons different than other electrons

A

Valence electrons are on the outermost shell

39
Q

What are the three types of elements found in the periodic table? Name and describe 2

A

Metals, Non-metals and Metalloids

Grade 9 Chemistry (1 decks)

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