Class 1 Chemistry Flashcards

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1
Q

Matter is?

A

Another word for all substances that make up our world.

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2
Q

Chemical is?

A

Substance that has the same composition and properties whatever it is found.

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3
Q

Observation

A

Observe, describe, measure

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4
Q

Hypothesis

A

Possible interpretation of observation

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5
Q

Experiment

A

Test to determine validate of hypothesis

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6
Q

Metric system

A

Measurement based on 10

Prefix attached to any unit increases or increases its size by a factor of 10.

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7
Q

Scientific notation

A

Consists of part: a Coefficient, a power of 10 and a unit of measurement.

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8
Q

Length

A

Centimeters, millimeters

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9
Q

Volume

A

Space Occupied by a substance

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10
Q

Mass

A

Amount of matter in an object

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11
Q

Density

A

Mass per unit volume, how much Volume a mass displaces

Measured in g/ml

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12
Q

Matter

A

Matter is everything that has mass and occupies space.
Matter is everywhere.
A substance is matter that has a fixed composition

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13
Q

Two types of pure substances

A

Element

Compound

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14
Q

Mixtures

A

Consisting of two or more different substances mixed together but not chemically combined

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15
Q

Homogeneous mixture

A

Solution composition of the substances are uniform

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16
Q

Heterogeneous mixture

A

Components are visible without uniform composition

17
Q

Mixtures can be physically separated

A

.

18
Q

States of matter

A

Solid-definite shape and volume particles are close together and rigid
Liquid-definite volume, no definite shape, particle slowly and randomly. Take shape of container
Gas- no shape or volume, particle are far away, have no attraction to each other, take shape of container

19
Q

Physical

A

Characteristics that measured or observed without affecting the identity of the substance

20
Q

Chemical

A

Does that describe the ability of a substance to change into a new substance

21
Q

Physical change

A

Appearance changes but composition stays the same. Melting, boiling, freezing, condensing (all are water)

22
Q

Temperature conversion

A

T(f)=1.8xT(c)+32

T(c)= T(f)-32/1.8

23
Q

Element

A

Pure substance from which all other things are built. Elements cannot be broken down into simpler substances.

24
Q

The Atom

A

All elements in the periodic table are made up of Atoms.

Adams are the smallest particle of an element

25
Q

Electrical charges

A

Subatomic particles make up Atoms.
Protons, neutrons, electrons

Electrons are negatively charged outside the nucleus
Protons are positively charged inside the nucleus
Neutrons are neutral and inside the nucleus

26
Q

Atoms and elements

A

Opposites Attract

27
Q

Chemistry is?

A

The study of composition, structure, Properties and reactions of matter.