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The Best Review On The Planet > CHEM QUIZ TUES > Flashcards

CHEM QUIZ TUES Flashcards

1
Q

Matter

A

Anything that has mass and volume

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2
Q

Homogenous

A

-All the same
-Pure and uniform

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3
Q

Heterogenous

A

-Not pure and uniform
-Different

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4
Q

Substances

A

-Any matter that is pure and uniformed in composition (homogenous)

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5
Q

Two types of substances

A

-Elements
-Compounds

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6
Q

Element

A

-The most basic form of matter that keeps its properties

-Homogenous

-All atoms of the same element have the same atomic number (number of protons)

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7
Q

Can an element be decomposed chemically?

A

NO!!!!!!!!!!

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8
Q

Compound

A

-Chemical combination with changed properties

-All samples of the same compound: HOMOGENOUS + have a definite composition

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9
Q

Binary compound

A

A compound consisting of 2 different elements

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10
Q

Particle Diagram: Monatomic element

A

-1 type of circle

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11
Q

Particle Diagram: Diatomic element

A

-2 of the same type of circle

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12
Q

Particle Diagram: Compound

A

-2 or more different circles combined

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13
Q

Mixture

A

-Composed of two or more different substances that can be separated physically

-Components in a mixture - retain its original properties + proportions can vary

(physical combination is not changed)

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14
Q

Homogenous mixtures

A

-Matter that is pure and uniform
-Particles are all the same and evenly mixed

Ex. Saltwater

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15
Q

Heterogenous mixtures

A

-Particles are not evenly mixed or distributed- they are layered

-Ex. Oil and water

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16
Q

A homogenous mixture in which something is dissolved in water is called an

A

Aqueous solution

Ex. Saltwater

17
Q

Chemical change

A

-Atoms are rearranged into new combinations
- changes are not reversible without another reaction

18
Q

Evidence of a chemical change

A

-Energy produced
-Gas given off
-Burning/combustion
-Rust
-Decomposition
-Oxidation

19
Q

Physical change

A

-The rearrangement of existing particles

20
Q

Evidence of a physical change

A

-Malleable
-Ductile
-Solubility
-Conductivity
-Luster
-Density

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