Exam 1 Flashcards

0
Q

Molecular compound

A

Two or more non metals

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1
Q

Ionic compound

A

Composed with anion and cations

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2
Q

Molecular element

A

Occur naturally as groups of two or more atoms

-known as diatomic

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3
Q

Atomic element

A

Exists as an individual atom

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4
Q

Atoms

A

Submicroscopic particles that are fundamental building block of all matter

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5
Q

Molecules

A

Two or more joined to one another in specific geometric arrangement

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6
Q

Pure substance

A

Matter composed of only one type of atom or molecule

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7
Q

Mixture

A

Two or more different type of atom or molecule that may vary in proportion

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8
Q

Compound

A

A pure substance composer of two or more elements in fixed definite proportion

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9
Q

Element

A

A pure substance that cannot be broken down into simpler substance

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10
Q

Physical property

A

Without changing its composition

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11
Q

Chemical property

A

Changing its composition

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12
Q

Physical change

A

Changes appearance but not its composition

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13
Q

Chemical change

A

Matter changes its composition

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14
Q

The law of conservation of energy

A

States that energy is neither created or destroyed

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15
Q

Heat capacity

A

Heat needed to raise the temp of a substance by 1 degree Celsius

16
Q

Specific heat capacity

A

Heat needed to raise the temp of 1 gram of substance by 1 degree Celsius

17
Q

Neutrons

A

Neutral charged particle

  1. 67493 x 10^-27
  2. 0087 amu
18
Q

Protons

A

Positive charged particle

  1. 67262 x 10^-27
  2. 0073 amu
19
Q

Electrons

A

Negative charged particles

  1. 1 x 10^-31
  2. 00055 amu
20
Q

Observation

A

Simple description of complex measurement

21
Q

Hypothesis

A

Observation lead to preliminary interpretation or explanation

22
Q

Experiment

A

Highly controlled observations designed to validate / invalidate a hypothesis

23
Q

Scientific law

A

Statement that synthesizes past observation and predicts future ones

24
Q

Theory

A

Models of nature that provides a broader and deeper explanation of observations and laws

25
Q

Scientific method

A

A way of learning that emphasizes observation and experimentation

26
Q

Isotopes

A

Same number of protons but different numbers of neutrons

27
Q

Ion

A

Charged particles

28
Q

Anion

A

Negative charged particle

29
Q

Cation

A

Positive charge particle

30
Q

Endothermic

A

Absorbing energy

31
Q

Exothermic

A

Releasing energy

32
Q

Homogeneous

A

Uniformed composition throughout

33
Q

Heterogeneous

A

Varied composition from one region to another

34
Q

Gas

A

Great distance between particles with free movement

35
Q

Liquid

A

Closely packed particles but free to move around

36
Q

Soild

A

Closely packed particles with fixed locations

37
Q

Matter

A

Anything that occupies space and has mass