Unit 4 Live Lesson 2/1

Unit 4 Vocab Review

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atom

neutron

cell

1

the smallest unit of an element that has the properties of that element

Proton

Electron

Neutron

2

a subatomic particle with a positive charge that is located in the nucleus of an atom

3

Electron

Proton

Neutron

a subatomic particle with no electric charge, located within the nucleus of the atom

4

Proton

Neutron

Electron

a subatomic particle with a negative charge

5

Nuclear Orbit

Electron shell

Atomic Mass

the path or orbit electrons follow around the nucleus of an atom

6

Nuclear Energy

Electricity

Atomic Energy

the energy released when the nucleus of an atom is split apart (during fission) or combined with another nucleus (during fusion)

Nucleus

Proton

Cell

7

the center of an atom containing protons and neutrons

8

Elements

Cells

Quarks

a class of subatomic particles that are the building blocks of protons and neutrons.

9

Nuclear Mass

Atomic Mass

Nuclear Number

The combined mass of all of the protons and neutrons of an atom.

10

Atomic Number

Atomic Mass

Nuclear Number

the number of protons in the nucleus of an atom

Compound

Cell

Electron Shell

11

a chemical combination of two or more elements

12

Molecule

Nucleus

Element

a pure substance that cannot be broken down into simpler substances by chemical reactions and that is made up of only one type of atom

13

Isotope

Element

Ion

a charged atom or group of atoms formed by the addition or removal of one or more electrons

14

Ion

Isotope

Compound

an atom of the same element with the same number of protons but a different number of neutrons; has the same atomic number but different atomic mass

Matter

Element

Ion

15

material that has mass and takes up some amount of space

16

Element

Cell

Molecule

a group of atoms held together by chemical bonds

17

Elemental Table

Atomic Table

Periodic Table

the chart scientists use to organize and classify all the known elements

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Mendeleev

Bohr

Rutherford

18

a Russian scientist who organized and classified the elements based on similar physical and chemical properties; his work was the basis for the modern periodic table of the elements

19

Noble Gas

Metal

Metalloid

a shiny, dense substance that easily conducts heat and electricity

Metalloids

Halogens

Groups

20

elements that lie between the metals and the nonmetals on the periodic table; these element exhibit both metallic and nonmetallic properties

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