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Z > Chemistry > Flashcards

Chemistry Flashcards

1
Q

_______’s results are NUMERICAL

A

Quantitative

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2
Q

______’s results are made by using the senses

A

Qualitative

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3
Q

What value tells us the number of protons in an atom of an element?

A

Atomic #

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4
Q

What category are born and silicon in on the periodic table?

A

Metalloids

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5
Q

Which of the following represents a compound: F2, Br2, NO, Ca

A

NO

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6
Q

What is matter?

A

Anything that has mass and takes up space

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7
Q

What is a physical property?

A

A characteristic of a substance that can be measured and observed without changing identity of substance (qualitative/quantitative)

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8
Q

Change of state is a __________ physical property.

A

Qualitative

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9
Q

Viscosity is a _______ physical property

A

Quantitative

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10
Q

What is sublimation?

A

Changing from a solid to a gas

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11
Q

Ductility is a _________ physical property

A

Quantitative

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12
Q

Hardness is a ________ physical property

A

Quantitative

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13
Q

Conductivity is a ____________ physical property

A

Quantitative

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14
Q

What is a chemical property?

A

The ability of a substance to change/react and form new substances

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15
Q

What are 3 examples of a chemical property?

A

Reactivity with acid, combustibility, corrosion (stability, toxicity)

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16
Q

What are the 5 points of the particle theory?

A

Particles, Identical, Spacing, Attraction, Movement

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17
Q

Matter is divided into 2 groups; _______ and _______

A

Mixtures (made up of 2 or more different types of particles) and pure substances (made of only 1 type o’ particle)

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18
Q

What is the difference between mixtures and compounds?

A

Compounds are chemically combined while mixtures are physically combines

19
Q

________ is a type of mixture in which you can see 2 or more phases

A

Heterogenous mixture

20
Q

What is a physical change?

A

A change in matter that doesn’t produce any new products or substances

21
Q

What is a chemical change?

A

A change in matter that produces new substances

22
Q

What are the 5 clues that a chemical change happened?

A

A new colour appears, heat is given off, bubbles of gas are formed, precipitate forms in a liquid, change is difficult to reverse

23
Q

What is the mass number?

A

Total number of neutrons and protons

24
Q

What are examples of subatomic particles?

A

Electrons, protons, neutrons

25
Q

Burying garbage is a _______ change

A

Physical THEN chemical

26
Q

Running a car motor is a _____ change

A

Chemical

27
Q

Dissolving sugar is a ___________ change

A

Physical

28
Q

Melting wax is a ________ change

A

Physical

29
Q

The number of valence electrons increases ___________

A

As you move across a period (is the same for elements in the same group)

30
Q

The size of an atom increases as you move _________

A

Down or right to left

31
Q

What are 2 ways that atoms can combine?

A
  1. Gaining or losing electrons

2. Sharing electrons

32
Q

What are ionic bonds?

A

Ions held together by their charges, very strong (crystal lattice)

33
Q

What are covalent bonds?

A

Atoms held together because they are sharing electrons

34
Q

What is viscosity?

A

The measure of a substance’s resistance to flow (viscous = slow)

35
Q

What is melting point?

A

Temperature where a solid turns into a liquid

36
Q

What is solubility?

A

A measure of the ability of a substance to dissolve in another

37
Q

What is ductility?

A

The ability of a substance to be stretched into a wire

38
Q

What is hardness?

A

A substance’s ability to be scratched

39
Q

What is conductivity?

A

A substance’s ability to conduct electricity or heat

40
Q

What is combustibility?

A

A substance’s ability to burn in air

41
Q

What is corrosion?

A

A substance’s ability to react with air to form an oxide

42
Q

What is stability?

A

A substance’s ability to remain unchanged

43
Q

What is toxicity?

A

A substance’s ability to cause harmful effects in plants/animals

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