Table Of Elements

Front 1

The simplest pure substances are called

Back 1

Elements

Front 2

Why are elements often called the building blocks of matter

Back 2

Beacause all matter is composed of one element or a combination of two or more elements

Front 3

Compound is a combined with

Back 3

two or more elements

Front 4

Is a compound combined chemically?

Back 4

Yes

Front 5

What is a mixture combined with

Back 5

Elements, compund or both

Front 6

Is the mixture combined chemically

Back 6

No

Front 7

Sodium chloride is an example of a compound true or false

Back 7

True

Front 8

Is Air a mixture

Back 8

Yes

Front 9

Is Gasoline a mixture

Back 9

Yes

Front 10

Is Soil a mixture

Back 10

No

Front 11

Is oxygen a mixture

Back 11

No

Front 12

What is the smallest particle of an element called

Back 12

An Atom

Front 13

Why do scientist use models to help them udnerstand atoms

Back 13

That way they will be able to see something that you can't see with your eyes

Front 14

An atom of one element cannot be changed into an atom of a different element. Is this a Dalton's Atomic Theory

Back 14

Yes

Front 15

With only a few changes, Dalton's atomic theory is still accepted today. True or False

Back 15

True

Front 16

Who described the atom as negative changes scattered through a ball of positve charge

Back 16

JJ Thompson

Front 17

What experiment convinced Ernest Rutherford that the atom has a small, positively charged nucleus

Back 17

The Gold Foil Experiment

Front 18

The term Rutherford gave to the positively charged particles in the nucleus of an atom was

Back 18

Peach

Front 19

The atomic model of _____ reembled planets orbiting the sun

Back 19

Bohr

Front 20

What particle did Chadwick discover in 1932 that was hard to detect becasue it had no electrical charge

Back 20

Neutron

Front 21

Since 1930, the model of the atom has changed a great deal

Back 21

False

Front 22

Atoms have no overall electrical charge. True or False

Back 22

True

Front 23

Most of the volume of an atom consists of protoms and neutrons

Back 23

True

Front 24

Most of the mass of an atom is due to electrons

Back 24

False

Front 25

Atoms of different elements have the same number of protons

Back 25

False

Front 26

Matter

Back 26

Anything that has mass and takes up space

Front 27

Element

Back 27

Simplest pure substance that cannot be broken down into any other substance

Front 28

Compound

Back 28

Pure substance made of two or more elements that are combined chemically in a specific ratio

Front 29

Mixture

Back 29

Two or more substances that are in the same place but NOT chemically combined

Front 30

Atom

Back 30

Smallest particle of an element

Front 31

Scientific Theory

Back 31

Well-tested idea that explains and connects a wide range of observations

Front 32

Model

Back 32

Physical or other representation of an idea to help people understand that they cannot observe directly

Front 33

Electron

Back 33

Negatively charged particle in an atom

Front 34

Nucleus

Back 34

Positively charged region in the center of an atom

Front 35

Proton

Back 35

Positively charged particle in nucleus of an atom

Front 36

An atom is made up of

Back 36

Protons, Neutrons and Electrons

Front 37

Sceintist once thought atoms could not be divided into smaller parts. True or False

Back 37

True

Front 38

What happened when sceintist sent electric curernt through the tube

Back 38

The gas inside the tube began to glow

Front 39

How did the glowing beam travel?

Back 39

It started at the negatively cahrged end of the tube and trveled to the positively charged end