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S2 Chemistry > S2 Atomic Theory > Flashcards

S2 Atomic Theory Flashcards

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1
Q

What is all matter made of?

A

Atoms

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2
Q

Who discovered atoms?

A

John Dalton in 1808

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3
Q

Who discovered protons?

A

Ernest Rutherford in 1919-1920

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4
Q

Who discovered electrons?

A

JJ Thomson in 1897

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5
Q

Who discovered neutrons?

A

James Chadwick in 1927

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6
Q

What parts of an atom are found in the nucleus of an atom?

A

Protons and neutrons

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7
Q

Where are electrons found?

A

In the shells (energy levels) surrounding the nucleus

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8
Q

What is the number of protons called?

A

The atomic number

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9
Q

How do you find the number of neutrons in an atom?

A

Mass number - Atomic number

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10
Q

What is the mass and charge of a proton?

A 
Mass = 1
Charge = positive
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11
Q

What is the mass and charge of an electron?

A 
Mass = 0
Charge = negative
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12
Q

What is the mass and charge of a neutron?

A 
Mass = 1
Charge = Neutral
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13
Q

Who created the periodic table?

A

Dmitri Mendeleev in 1869

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14
Q

How are the elements organized in the periodic table?

A

By atomic number

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15
Q

Where do some of the elements name’s originate from?

A

Greek, Latin, Planets, countries, people who discovered them

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16
Q

What groups of elements are in the periodic table?

A

Alkali metals, halogens, noble gases, pnictogens, chalcogens

17
Q

What group number in the periodic table are the alkali metals?

A

Group 2

18
Q

What group number in the periodic table are the halogens?

A

group 7

19
Q

What group number in the periodic table are the pnictogens?

A

Group 5

20
Q

What group number in the periodic table are the noble gases?

A

Group 8

20
Q

What group number in the periodic table are the noble gases?

A

Group 8

21
Q

What group number in the periodic table are the chalcogens in?

A

Group 6

22
Q

What are the properties of metals?

A

Good conductors of electricity and heat, malleable, high melting point, high density, ductile

23
Q

Where are metals positioned on the periodic table?

A

under the stairs

24
Q

What is a compound?

A

2 or more elements chemically bonded together

25
Q

What is a mixture?

A

2 or more substances that are not chemically bonded

26
Q

Examples of compounds

A
27
Q

When does a compound end with -ide

A

A 2 element compound

S2 Chemistry (1 decks)

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