Science - Elements & Compounds Test Review

Front 1

Define: Element

Back 1

a pure substance that cannot be broken down into a simpler substance - SMALLEST UNIT OF MATTER

Front 2

Define: COMPOUND

Back 2

a pure substance that is made of more than atom or element

Front 3

Define: ATOM

Back 3

smallest unit of matter

Front 4

Define: MOLECULE

Back 4

two or more elements combined; can be an element (H2, N2, O2) or a compound (CO2, H20)

Front 5

True or False: a MOLECULE can be EITHER an ELEMENT or a COMPOUND

Back 5

true

Front 6

Define: PURE SUBSTANCE

Back 6

made of ONLY ONE THING.

i.e - Pure Element, Pure Molecule, Pure Compound

Front 7

Define: MASS

Back 7

the amount of matter in an object

Front 8

Define: VOLUME

Back 8

the amount of SPACE an object takes

Front 9

Define: DENSITY

Back 9

the amount of matter in a GIVEN SPACE

Front 10

Define: INDEPENDENT VARIABLE

Back 10

the part of the experiment that you MEASURE

Front 11

Define: INDEPENDENT VARIABLE

Back 11

the ONE thing in an experiment that is CHANGED or MANIPULATED

Front 12

What is the formula to calculate DENSITY?

Back 12

Density = Mass / Volume (D = M/V)

Front 13

If Density = Mass divided by Volume (D=M/V), then how do you calculate volume?

Back 13

Volume (V) = Mass (M) / Density (D)

Front 14

True or False: ATOMS are the SMALLEST PARTICLE of a substance?

Back 14

True

Front 15

How many elements are found on the periodic table?

Back 15

?

Front 16

True or False:Elements are smaller than Atoms?

Back 16

False! Atoms are the smallest particle of a substance

Front 17

How many naturally occurring elements are there?

Back 17

92

Front 18

The current version of the periodic table is by: Mendeleev or Mendelsohn?

Back 18

Mendeleev

Front 19

What year was the current version of the period table created?

Back 19

1869

Front 20

True or False:Elements do not have unique physical and chemical properties

Back 20

False! Elements DO have unique physical and chemical properties

Front 21

Can elements be made in the laboratory?

Back 21

yes

Front 22

Does "A" represent the Atomic Number or the Atomic Mass?

Back 22

Atomic Number

Front 23

What does "B" represent in the image?

Back 23

Element Symbol

Front 24

True or False: Atomic Mass is represented by "D" in this image.

Back 24

True

Front 25

What is the chemical symbol for Oxygen?

Back 25

O

Front 26

True or False: a chemical symbol can only be one letter

Back 26

False. A chemical symbol can be one letter or two.

Front 27

True or False: if the chemical symbol has two letters, the FIRST LETTER IS ALWAYS CAPITALIZED and the second letter is always lowercase

Back 27

True!

Front 28

True or False: Atoms can be the same element or different element

Back 28

True

Front 29

True or False: TWO OR MORE atoms combined are a MOLECULE

Back 29

True

Front 30

What is the difference between an ELEMENT molecule and a COMPOUND molecule?

Back 30

An ELEMENT Molecule is made up of 2 or more of the same element (O2)

A COMPOUND Molecule is made of of 2 or more of TWO OR MORE DIFFERENT elements (H2O)

Front 31

PRO-TIP! One capital letter = element

Two or more capital letters = compound

Back 31

Boom!

Front 32

Is H2SO4 an ELEMENT or a COMPOUND?

Back 32

Compound!

Front 33

Is "Fe" an element or a compound?

Back 33

element!

Front 34

"CH4 + O2" -- Identify how many compounds, elements, and atoms of each element are in the equation

Back 34

Compounds: 1 (CH4)

Elements: 3 (C, H, and O)

Atoms of each Element:

1 atom of C

4 atoms of H

2 atoms of O

Front 35

True or False: Some element names come from Latin or Greek

Back 35

True