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Flashcards in Chapter 3 Deck (43):
1

Which scientist developed this model?

 

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John Dalton

2

Which scientist developed this model?

 

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J.J. Thomson

3

Which scientist developed this model?

 

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Ernest Rutherford

4

Which scientist developed this model?

 

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Niels Bohr

5

Which scientist developed this model?

 

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James Chadwick

6

Who discovered the electrons

J.J. Thomson

7

Who discovered the nucleus and protons

Ernest Rutherford

8

Who discovered that electrons are found in specific orbits

Niels Bohr

9

Who discovered the neutron

James Chadwick

10

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

Atom

11

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

electron

12

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

Proton

13

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

Neutron

14

The central core of an atom which contains protons and neutrons

nucleus

15

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

Energy Level

16

The number of protons in the nucleus of an element

Atomic Number

17

The average mass of all the isotopes of an element 

Atomic Mass

18

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

Isotope

19

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

Periodic Table

20

A one- or two-letter representation of an element 

Chemical Symbol

21

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

Group

22

A horizontal row of elements in the periodic table

Period

23

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

Metals

24

An element that has some characteristics of both metals and nonmetals

Metalloid

25

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

Nonmetal 

26

The way a mineral reflects light from its surface

luster

27

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

malleable

28

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

ductile

29

The ability of an object to transfer heat

Thermal conductivity

30

The ability of an object to carry electric current

electrical conductivity

31

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

reactivity

32

A molecule consisting of two atoms

Diatomic molecule

33

A substance that can conduct electric current under some conditions

semiconductor

34

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

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Alkali metals

35

The family of elements found in Group2  of the Periodic Table

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Alkaline Earth Metals

36

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

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Transition Metals

37

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

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Halogens

38

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

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Noble Gases

39

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

7 Periods plus the Lanthanides and Actinides

40

There are how many groups in the Periodic Table?

18

41

The number 14 stands for what?

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Atomic Number

42

The letters "Si" stand for what?

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Chemical Symbol

43

The number 28.086 stands for what?

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Atomic Mass