Chemistry Ch. 2 + Ch. 5

Front 1

A homogeneous mixture may be separated by the process of __

Back 1

distillation

Front 2

The reaction: hydrogen+oxygen --> water is a ____ change.

Back 2

chemical

Front 3

Matter that is homogeneous and chemically separable is called a ___

Back 3

compound

Front 4

What elements are contained in table sugar?

Back 4

Carbon, Hydrogen, Oxygen

Front 5

How many phases does a heterogeneous mixture contain?

Back 5

two or more

Front 6

Melting point, boiling point, solubility, and color are ___ properties of matter.

Back 6

physical

Front 7

Homogeneous mixtures are also called ___ and consists of ___ phases.

Back 7

solutions ; one

Front 8

In chemical reactions, the starting substances are called ___

Back 8

reactants

Front 9

In chemical reactions, the formed substances are called ____

Back 9

products

Front 10

The name of the element ____, is derived from the Latin word calx, meaning lime.

Back 10

Calcium

Front 11

Words such as ferment, burn, explode, and rust indicate a ___ change.

Back 11

chemical

Front 12

Words such as melt, freeze, boil and condense indicate a ___ change.

Back 12

physical

Front 13

When a solution is distilled, the vapor is cooled through a ___ and becomes liquid.

Back 13

condenser

Front 14

An alloy is a type of solution in which a ___ phase is dissolved in a ___ phase.

Back 14

solid ; solid

Front 15

When sugar or salt is dissolved in water, a ___ change occurs.

Back 15

physical

Front 16

"Matter is neither created or destroyed in a chemical reaction" is a statement summarizing the ____.

Back 16

Law of Conservation of Mass

Front 17

In a chemical equation, reactants are separated from products by an ___.

Back 17

arrow

Front 18

The chemical symbol for Sodium is ___.

Back 18

Na

Front 19

The two gases produced in a combustion reaction are __ and ___.

Back 19

Carbon Dioxide, Water Vapor

Front 20

Brass, a blend of copper & zinc, is a ____ mixture.

Back 20

homogeneous

Front 21

The mass number is the sum of protons and ____.

Back 21

neutrons

Front 22

A neutral atom has an equal number of protons and ____.

Back 22

electrons

Front 23

All elements have atoms which differ in the number of neutrons, known as___.

Back 23

isotopes

Front 24

There are ___ protons in each atom of phosphorus.

Back 24

15

Front 25

There are ___ electrons in each atom of phosphorus.

Back 25

15

Front 26

An electron's mass is about ___ that of the mass of a hydrogen atom.

Back 26

1/1840

Front 27

Rutherford used a narrow beam of ___ aimed at the metal ____ to investigate the atom's structure.

Back 27

alpha particles ; gold

Front 28

An __ is 1/12 the mass of a carbon-12 atom.

Back 28

atomic mass unit

Front 29

A weighted average mass of an element is one that takes into consideration the ___ of isotopes and the __ of them in nature.

Back 29

relative abundance ; occurence

Front 30

The isotope known as ___ has 1 proton, 1 electron, 0 neutrons.

Back 30

Protium

Front 31

The isotope known as __ has 1 proton, 1 electron, and 2 neutrons.

Back 31

Tritium

Front 32

The average atomic mass of carbon is ___ amu.

Back 32

12.011

Front 33

Rays that travel from the cathode to the anode are ___ ___.

Back 33

cathode rays

Front 34

Rays that travel from the anode to the cathode are ___ ___.

Back 34

anode rays

Front 35

The number of neutrons in a carbon-14 atom is ___.

Back 35

8

Front 36

The electron's discovery is credited to ___

Back 36

JJ Thomson.

Front 37

The neutron's discovery is credited to ___.

Back 37

James Chadwick

Front 38

The ideas in the modern atomic theory are credited to ___

Back 38

John Dalton.

Front 39

Isotopes behave ____ the same, but they have different ___ properties.

Back 39

chemically ; physical

Front 40

The columns in the periodic table are called __

Back 40

groups

Front 41

The rows in the periodic table are called ___, while the columns are ___.

Back 41

periods ; groups

Front 42

The noble gases are in group __ of the periodic table.

Back 42

8A

Front 43

Elements in the periodic table that border the zig-zag line are known as ___.

Back 43

metalloids

Front 44

There are ___ inner transition elements currently known.

Back 44

30

Front 45

The periodic table was arranged by atomic numbers due to work done by the physicist ___.

Back 45

Henry Mosely

Front 46

Formula to find AMU with isotopes:

Back 46

(AMU1)(.Percent)+(AMU2)(.Percent)

Front 47

Percent Error Formula:

Back 47

|accepted-experimental|
----------------------------------- x 100
accepted

Front 48

Formula to find Percent with AMUs:

Back 48

X = Greater Isotope
1 - x = Smaller Isotope


Overall AMU(On periodic table)=(x)(exact mass)+(1-x)(exact mass)