Chapter 3

Question 1

Which scientist developed this model?

Answer 1

John Dalton

Question 2

Which scientist developed this model?

Answer 2

J.J. Thomson

Question 3

Which scientist developed this model?

Answer 3

Ernest Rutherford

Question 4

Which scientist developed this model?

Answer 4

Niels Bohr

Question 5

Which scientist developed this model?

Answer 5

James Chadwick

Question 6

Who discovered the electrons

Answer 6

J.J. Thomson

Question 7

Who discovered the nucleus and protons

Answer 7

Ernest Rutherford

Question 8

Who discovered that electrons are found in specific orbits

Answer 8

Niels Bohr

Question 9

Who discovered the neutron

Answer 9

James Chadwick

Question 10

the basic particle from which all elements are made; the smallest particle of an element that has the properties of that element

Answer 10

Atom

Question 11

a tiny, negatively charged particle that moves around the outside of the nucleus of an atom

Answer 11

electron

Question 12

Small, positively charged particles that are found in the nucleus of an atom

Answer 12

Proton

Question 13

A small particle in the nucleus of the atom, with no electrical charge

Answer 13

Neutron

Question 14

The central core of an atom which contains protons and neutrons

Answer 14

nucleus

Question 15

A region of an atom in which electrons of the same energy are likely to be found

Answer 15

Energy Level

Question 16

The number of protons in the nucleus of an element

Answer 16

Atomic Number

Question 17

The average mass of all the isotopes of an element

Answer 17

Atomic Mass

Question 18

An atom with the same number of protons and a different number of neutrons from other atoms of the same element

Answer 18

Isotope

Question 19

An arrangement of the elements showing the repeating pattern of their properties

Answer 19

Periodic Table

Question 20

A one- or two-letter representation of an element

Answer 20

Chemical Symbol

Question 21

Elements in the same vertical column of the periodic table; also called family

Answer 21

Group

Question 22

A horizontal row of elements in the periodic table

Answer 22

Period

Question 23

A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity

Answer 23

Metals

Question 24

An element that has some characteristics of both metals and nonmetals

Answer 24

Metalloid

Question 25

An element that lacks most of the properties of a metal. It is dull, brittle, and poor conductor of heat and electricity

Answer 25

Nonmetal

Question 26

The way a mineral reflects light from its surface

Answer 26

luster

Question 27

A term used to describe material that can be hammered or rolled into flat sheets

Answer 27

malleable

Question 28

A term used to describe a material that can be pulled out into a long wire

Answer 28

ductile

Question 29

The ability of an object to transfer heat

Answer 29

Thermal conductivity

Question 30

The ability of an object to carry electric current

Answer 30

electrical conductivity

Question 31

The ease and speed wwith which an element combines, or reacts, with other elements and compounds

Answer 31

reactivity

Question 32

A molecule consisting of two atoms

Answer 32

Diatomic molecule

Question 33

A substance that can conduct electric current under some conditions

Answer 33

semiconductor

Question 34

The family of elements found in Group 1 of the Periodic Table

Answer 34

Alkali metals

Question 35

The family of elements found in Group2 of the Periodic Table

Answer 35

Alkaline Earth Metals

Question 36

The family of elements found in Group 3 to 12 of the Periodic Table

Answer 36

Transition Metals

Question 37

The family of elements found in Group 17 of the Periodic Table

Answer 37

Halogens

Question 38

The family of elements found in Group 18 of the Periodic Table

Answer 38

Noble Gases

Question 39

There are a total of how many periods in the Periodic Table?

Answer 39

7 Periods plus the Lanthanides and Actinides

Question 40

There are how many groups in the Periodic Table?

Answer 40

18

Question 41

The number 14 stands for what?

Answer 41

Atomic Number

Question 42

The letters "Si" stand for what?

Answer 42

Chemical Symbol

Question 43

The number 28.086 stands for what?

Answer 43

Atomic Mass