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chemistry final semester 1 > chemistry semeseter exam > Flashcards

chemistry semeseter exam Flashcards

1
Q

what is a qualitative statement?

A

it describes something using words.

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2
Q

hypothesis = ?

A

a testable statement used for making predictions and carrying out further experiments.

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3
Q

laws?

A

predict what will happen

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4
Q

same the SI base units

A

Kilogram, meter, second, kelvin

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5
Q

density

A

the amount of matter per unit volume

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6
Q

the unit centimeters cubed measures?

A

volume

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7
Q

a measure of the amount of matter is ?

A

mass

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8
Q

an experimental value that closely aggress with excepted values is?

A

accurate

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9
Q

the symbol that represents the measured unit for volume is ?

A

milliliters

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10
Q

the SI base unit for temperature is ?

A

kelvin

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11
Q

the relationship between the mass, volume, and density is ?

A

DV = m

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12
Q

The state of matter in which a material has a definite shape and definite volume Is?

A

SOLID STATE

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13
Q

A list of pure substances could include….

A

H2O

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14
Q

The melting of a candle wax is classified as physical change because?

A

It does not produce any new substances

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15
Q

The most useful source of chemical information about the element is?

A

Periodic Table

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16
Q

The substance classified as a fluid, contains particles that….

A

Slide past each other!

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17
Q

The state of matter in which a material does not change physical state under pressure is?

A

SOLID STATE

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18
Q

A horizontal row of blocks in the periodic table is called?

A

Period

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19
Q

Under ordinary conditions of temperature and pressure, the particles in a gas are?

A

Very far from each other

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20
Q

The particles in a solid are..?

A

Packed closely together

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21
Q

The state of matter in which a material has a definite volume, but no definite shape is?

A

liquid state

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22
Q

The state of matter in which particles can be compressed into a liquid is?

A

Solid State

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23
Q

Which of the following is an intensive physical property?

A

Color

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24
Q

There are how many groups on the period table?

A

18

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25
Q

Chemical properties =?

A

changes that altar the identity of the substance!

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26
Q

A physical change occurs when a?

A

A glue gun melts a glue stick?

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27
Q

Properties of Metals?

A

Conduct Heat and Energy, Malleable, Solids at room temperature,

28
Q

Properties of Nonmetals?

A

Cannot conduct heat and energy, gases at room temperature, some are solids

29
Q

Metalloids

A

Characteristics of metals and nonmetals, appear along stair cases solids at room temp

30
Q

Elements in a group in the periodic table are expected to have similar?

A

Properties

31
Q

One chemical property of Matter is…?

A

reactivity

32
Q

physical means can be used to separate?

A

Mixtures

33
Q

The elements that border the zigzag line are…?

A

Metalloids

34
Q

There are how many periods in the periodic table?

A

7

35
Q

law of conservation of mass?

A

mass of compound form = mass of individual emblements

36
Q

law of multiple proportions= ?

A

atoms combined small whole ratios

37
Q

the father of the modern atomic theory

A

Daltons theory

38
Q

modern atomic theory?

A
  1. all matters made up of atoms 2. atoms of different elements have different properties. 3. atoms are divisible into smaller particles. 4. atoms are indivisible by chemical processes 5. atoms of different elements combined in whole number ratios to make compounds.
39
Q

the raise produced in a cathode tube are?

A

found to carry a negative charge

40
Q

a negatively charged electrode ?

A

cathode

41
Q

experiments with cathode rays led to the discover of ?

A

the electrons

42
Q

discoverer of the nucleus

A

Rutherford

43
Q

in Rutherford’s experiments few of the particles?

A

bounced back

44
Q

characteristics of the nucleus?

A
  1. dense 2. positive 3. contains nearly all of the atoms mass
45
Q

why is an atom neutral ?

A

the number of protons are equal to the number of electrons

46
Q

most of the volume of an atom is occupied by?

A

electrons

47
Q

isotopes are atoms of the same element that have different ?

A

masses

48
Q

all isotopes of hydrogen contain ?

A

one proton

49
Q

the total number of protons and neutrons in the nucleus is?

A

mass number

50
Q

Positive Ion?

A

Cation

51
Q

Negative Ion?

A

Anion

52
Q

What is a bionary compound?

A

Two elements put together

53
Q

Ternary Compounds?

A

Contains Polyatomic Ions

54
Q

Acids

A

Compounds containing H & a nonmetal: MAKE SURE IT STARTS WITH AN H

55
Q

Binary Ionic Compounds

A

Contain a Metal and Nonmetal

56
Q

A solid produced by a chemical reaction in solution that separates from the solution is called?

A

A precipitate

57
Q

What is the small whole number that appears to the right of an element in a chemical formula?

A

Subscript

58
Q

To balance a chemical equation it might be necessary to adjust the….?

A

Coefficient

59
Q

According to the law of conservation of mass, the total mass of the reacting substance is?

A

equal to the total mass of the products

60
Q

A chemical equation is balanced when

A

The number of atoms in the reactants is the same number of the atoms in the products

61
Q

The symbol for a substance dissolved in water is?

A

Aq

62
Q

A chemical formula written over the arrow in a chemical equation means?

A

a catalyst for the reaction

63
Q

A balanced chemical equation is a direct representation of the?

A

Law of Conservation of Mass

64
Q

A summary of observed behavior

A

Natural Law

65
Q

An explanation of behavior

A

Theory

66
Q

What do we call a homogeneous mixture

A

A Solution

67
Q

What state of matter is a diamond

A

Solid

chemistry final semester 1 (1 decks)

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