Unit 1 - Matter on the Atomic Scale Flashcards

1
Q

What is the macroscopic scale?

A

Matter which can be seen by the naked eye and held

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2
Q

What is the atomic scale?

A

A Nanoscale and molecular scale, you cannot see whats happening with the atoms with the naked eye

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3
Q

How is matter classified?

A

The tree of how matter is build up upon its self – look at picture on slides for a image or just search

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4
Q

What are mixtures

A

2+ substances that are mixed together without a fixed ratio, and variable proportion of each.

No reaction, each substance has its own properties

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5
Q

How can the components of a mixture be sepaprated?

A

Through physical properties (filtration or evaporation etc)

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6
Q

What is a Homogeneous Mixture?

A

A mixture which consists of 2+ substances that are in one uniform phase: You have a drink and put a drink mix in it.

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7
Q

What is a pure substance?

A
  • A compound or element that has unique physical properties
  • it has known chemical properties
  • cannot be separated by physical processed
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8
Q

What is an element

A

A substance that is composed of only one TYPE of Atom (not quantity H2 is still a element)

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9
Q

Can an element be broken into a simpler substance?

A

nauwr

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10
Q

What is a compound?

A

A molecular complex which is composed of 2+ different TYPES of elements through a chemical bond

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11
Q

can compounds be broken into simpler substances?

A

YEAAAAS!!!!!!!!

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12
Q

What causes a compounds properties to differ from one another?

A

The number and types of elements that make it up
- each type has a fixed ratio, it can multiply but only with that set amount of elements to elements

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13
Q

What is complete combustion

A

It is a reaction which occurs when there is an unlimited supply or air (usually O2) in the air.

Allowing for the reaction to complete successfully

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14
Q

What is an incomplete Combustion?

A

When there is not enough O2 in the air and the combustion uses all the fuel in the reaction, producing a limiting number of products

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15
Q

What is Density

A

The measurement of how tightly a material is packed together

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16
Q

How do you find the measurement for an irregular shape?

A

Through water displacement

17
Q

Conversion Factor: giga (G)

A

10^9

18
Q

Conversion Factor: Mega (M)

A

10^6

19
Q

Conversion Factor: kilo (k)

A

10^3

20
Q

Conversion Factor: deci (d)

A

10^-1

21
Q

Conversion Factor: Centi (c)

A

10^-2

22
Q

Conversion Factor: milli (m)

A

10^-3

23
Q

Conversion Factor: Micro (μ)

A

10^-6

24
Q

Conversion Factor: nano (n)

A

10^-9

25
Q

Conversion factor: Meter (m)

A

10^1

26
Q

What is the difference between Percision and Accuracy?

A

Data Point: 90

Precision focuses more on how close the data is close together (1,1.5,2,2.25)

Accuracy Focuses more on how the data matches up with the data point (91,93,1,63,30)

27
Q

Scientific Notation

A
  • Way to express the precision of a measurement
  • more comprehensible number (0.00001 –> 1 x 10^4)
28
Q

What are Sig Figs?

A

Which digits that can be certain + one extra digit at the end

29
Q

How many Sig Figs: 269

A

3 (2, 6, 9)

30
Q

How many Sig Figs: 209

A

3 (2, 0, 9)

31
Q

How many Sig Figs: 2.9209

A

5 (2, 9, 2, 0, 9)

32
Q

How many Sig Figs: 0.0045

A

2 (4, 5)

33
Q

How many Sig Figs: 22.000

A

5 (2, 2, 0, 0, 0)

34
Q

How many Sig Figs: 1000

A

1 (1)

35
Q

Sig Fig of result after addition or subtraction

A

The number of decimal places is equal to the number with the fewest decimal points.

36
Q

Sig Fig of result after division or multiplication

A

The number of sig figs are equal to the value with the smallest sig figs

37
Q

Sig Fig of result after addition/subtraction and then afterwards Multiplication/Division

A

The number of sig figs are equal to the value with the smallest sig figs

38
Q

Sig Fig of result after Multiplication/Division and then afterwards addition/subtraction

A

The number of decimal places is equal to the number with the fewest decimal points.