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Science 8 > Chapter 3 > Flashcards

Chapter 3 Flashcards

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Biology 101 flashcards
1
Q

Which scientist developed this model?

A

John Dalton

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2
Q

Which scientist developed this model?

A

J.J. Thomson

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3
Q

Which scientist developed this model?

A

Ernest Rutherford

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4
Q

Which scientist developed this model?

A

Niels Bohr

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5
Q

Which scientist developed this model?

A

James Chadwick

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6
Q

Who discovered the electrons

A

J.J. Thomson

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7
Q

Who discovered the nucleus and protons

A

Ernest Rutherford

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8
Q

Who discovered that electrons are found in specific orbits

A

Niels Bohr

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9
Q

Who discovered the neutron

A

James Chadwick

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10
Q

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

A

Atom

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11
Q

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

A

electron

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12
Q

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

A

Proton

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13
Q

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

A

Neutron

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14
Q

The central core of an atom which contains protons and neutrons

A

nucleus

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15
Q

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

A

Energy Level

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16
Q

The number of protons in the nucleus of an element

A

Atomic Number

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17
Q

The average mass of all the isotopes of an element

A

Atomic Mass

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18
Q

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

A

Isotope

19
Q

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

A

Periodic Table

20
Q

A one- or two-letter representation of an element

A

Chemical Symbol

21
Q

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

A

Group

22
Q

A horizontal row of elements in the periodic table

A

Period

23
Q

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

A

Metals

24
Q

An element that has some characteristics of both metals and nonmetals

A

Metalloid

25
Q

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

A

Nonmetal

26
Q

The way a mineral reflects light from its surface

A

luster

27
Q

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

A

malleable

28
Q

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

A

ductile

29
Q

The ability of an object to transfer heat

A

Thermal conductivity

30
Q

The ability of an object to carry electric current

A

electrical conductivity

31
Q

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

A

reactivity

32
Q

A molecule consisting of two atoms

A

Diatomic molecule

33
Q

A substance that can conduct electric current under some conditions

A

semiconductor

34
Q

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

A

Alkali metals

35
Q

The family of elements found in Group2 of the Periodic Table

A

Alkaline Earth Metals

36
Q

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

A

Transition Metals

37
Q

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

A

Halogens

38
Q

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

A

Noble Gases

39
Q

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

A

7 Periods plus the Lanthanides and Actinides

40
Q

There are how many groups in the Periodic Table?

A

18

41
Q

The number 14 stands for what?

A

Atomic Number

42
Q

The letters “Si” stand for what?

A

Chemical Symbol

43
Q

The number 28.086 stands for what?

A

Atomic Mass

Science 8 (3 decks)

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