Quiz 2A Flashcards

1
Q

Anything that takes up space and has mass

A

Matter

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2
Q

from nothing

A

ex nihilio

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3
Q

Organization of matter

A

Pure substances–

Mixtures–

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4
Q

Can be measured without changing the material into another substance

A

Physical property

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5
Q

Describes how the particles are packed into a material

A

Density

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6
Q

Describes how easily a material can be hammered into shapes

A

Malleability

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7
Q

describes how easily materials can be drawn into thin wires

A

Ductility

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8
Q

Describes the ability of a material to transfer heat or electricity between its particles

A

Conductivity

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9
Q

Physical properties

A

color, odor, taste, shape, size, solubility, hardness, state, melting point, boiling point

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10
Q

Evident only when the material changes to another substance

A

Chemical properties

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11
Q

Chemical properties

A

Flammable- burns
Reactive- acts upon another
Oxidizes- combines with oxygen (or other nonmetals)

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12
Q

Two or more substances physically placed together, not chemically joined

A

Mixture

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13
Q

Only one kind of particle

A

Pure Substances

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14
Q

Different kinds of particles are visible; Example: sand and rocks

A

Heterogeneous

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15
Q

Different kinds of particles are NOT visible; Example: salt, water

A

Homogeneous

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16
Q

Another name for a homogeneous mixture

A

Solution

17
Q

Solution vs. Pure Substance

A

A pure substance has a fixed composition

A mixture has a variable composition

18
Q

Two types of Pure Substances

A

Elements

Compounds

19
Q

Substances that cannot be broken down into simpler substances by ordinary chemical means

A

Elements

20
Q

The smallest “piece” of an element that is still the element

A

Atom

21
Q

What is an atom made up of

A

Protons, Neutron, and Electrons (all are subatomic particles)

22
Q

Three categories of elements

A

Monatomic: He
Diatomic: O2
Polyatomic: S8

23
Q
  1. One or two letters represent the name of an element
  2. The first letter is always uppercase
  3. The second letter is always lowercase
A

Berzelius’s System

24
Q

Two or more atoms that are chemically bonded together

A

Molecules

25
Q

Can be expressed by a “FORMULA” which tell the number of atoms of each element present

A

Compounds

26
Q

Tells the type and number of atoms that are present in one molecule of a compound

A

Formula

27
Q

A number that indicates the amount of atoms or groups of atoms in a formula

A

Subscript

28
Q

A number in front of a formula which tells how many molecules or atoms are present

A

Coefficient