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Chemistry > Elements, Mixtures and Compounds Review > Flashcards

Elements, Mixtures and Compounds Review Flashcards

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1
Q

Mixture

A

Two or more substances combined but not bonded to each other

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2
Q

Element

A

A substance containing only one type of atom

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3
Q

Compound

A

A substance containing only one type of molecule. The molecule MUST contain 2 or more different types of atoms.

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4
Q

Atom

A

The smallest unit of an element that still maintains the properties of the element.

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5
Q

Molecule

A

Two or more atoms bonded to each other. The atoms may be the same making it an element. The atoms may be different making it a compound.

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6
Q

Chemical Bond

A

The link that holds two atoms together in a molecule. Caused by the sharing of electrons.

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7
Q

Pure Substance

A

A substance where all of the atoms are the same OR all of the molecules are the same. This includes both elements and compounds.

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8
Q

Oxygen gas (O2) is a mixture, compound or element?

A

Element

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9
Q

Carbon dioxide gas (CO2) is a mixture, compound or element?

A

Compound

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10
Q

Helium gas (He) is a mixture, compound or element?

A

Element

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11
Q

Nitrogen gas (N2) is a mixture, compound or element?

A

Element

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12
Q

Sucrose (C6H12O6) is a mixture, compound or element?

A

Compound

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13
Q

Amonia (NH3) is a mixture, compound or element?

A

Compound

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14
Q

Methane (CH4) is a mixture, compound or element?

A

Compound

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15
Q

Heterogeneous Mixture

A

Not well mixed. You can see the separate parts. Ex. Salad, dirt, pizza, cement.

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16
Q

Homogeneous Mixture

A

Very well mixed. You cannot see the separate parts.Ex. Milk, Salt water, Air

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17
Q

Solution

A

The most well mixed of the homogeneous mixtures. They appear clear. They consist of two parts, the solvent and the solute.

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18
Q

Solvent

A

Part of a solution. Does the dissolving.Ex. Water

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19
Q

Solute

A

Part of a solution. Gets dissolved.Ex. Salt, Sugar, Caffeine

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20
Q

Soluble

A

A property of matter. Describes something that is “able” to be dissolved.

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21
Q

Insoluble

A

A property of matter. Describes something that cannot be dissolved.

22
Q

Solubility

A

A measurement of how well something dissolves.

23
Q

List 4 ways to cheat in a solubility race.

A

Use less solute; use more solvent; use hot water; give your opponent something that is insoluble.

24
Q

What kind of mixture is saliva and sugar?

A

Homogeneous mixture

25
Q

What kind of mixture is water and salt?

A

Homogeneous mixture

26
Q

What kind of mixture is sand, salt and iron?

A

Heterogeneous mixture

27
Q

What kind of mixture is gum?

A

Homogeneous mixture

28
Q

What kind of mixture is pizza?

A

Heterogeneous mixture

29
Q

Chemical Change

A

A change in matter where a new substance is created from another substance or substances. The properties of the materials change.

30
Q

Something new is created. Is this is a sign of a chemical or physical change?

A

Chemical Change

31
Q

Heat changes from room temperature. Is this is a sign of a chemical or physical change?

A

Chemical Change

32
Q

Gas is emitted. Is this is a sign of a chemical or physical change?

A

Chemical Change….unless…It is a phase change then it is physical. A phase change does not change the molecule.

33
Q

Corrosion. Is this is a sign of a chemical or physical change?

A

Chemical Change

34
Q

Atoms or molecules move from one place to another. Is this is a sign of a chemical or physical change?

A

Physical Change

35
Q

An object changes phase. Is this is a sign of a chemical or physical change?

A

Physical Change

36
Q

Chemical bonds are broken. Is this is a sign of a chemical or physical change?

A

Chemical Change

37
Q

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

A

Element made of molecules. Pure substance.

38
Q

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

A

Compound, Pure Substance

39
Q

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

A

Mixture…it is composed of two elements

40
Q

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

A

Mixture of two compounds

41
Q

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

A

Mixture of elements and compounds

42
Q

Is this an element or a compound?

A

Element: both atoms are the same

43
Q

Is this a molecule?

A

Yes

44
Q

Is this an element or a compound?

A

Compound: There are two different elements shown here.

45
Q

Is this an element or a compound?

A

Compound

46
Q

Are these molecules?

A

Yes. There are three molecules. NOTE: These molecules are of a compound, because the atoms are from different elements.

47
Q

Is this an element or a compound?

A

Compound

48
Q

Is this an element or a compound?

A

Element: all atoms are the same

49
Q

Does this show molecules?

A

No. Molecules must be two or more atoms bonded together.

50
Q

Is this a chemical change or a physical change happening?

A

Chemical: bonds are being broken and made; new products are produced

51
Q

Is this a chemical change or a physical change happening?

A

Chemical: bonds are being broken and made; new products are produced

52
Q

Heat is being added to the H2O inside the flask. Is this a chemical change or a physical change happening?

A

Physical: No bonds are breaking; phase change just moves the molecules around; no new products are created

Chemistry (2 decks)

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