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Block Science > Aromic Theory And Periodic Table > Flashcards

Aromic Theory And Periodic Table Flashcards

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1
Q

A substance that is made of only one kind of atom is

A

An element

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2
Q

Subatomic

A

Smaller than an atom

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3
Q

All atoms of the same element have he same number of

A

Protons

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4
Q

An ion

A

An atom that has gained or lost electrons

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5
Q

An isotope

A

An atom that has a different number of neutrons

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6
Q

The charge of an atom is

A

Neutral

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7
Q

The charge of the nucleus is

A

Positive

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8
Q

How do you find mass number

A

Add protons and neutrons

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9
Q

Atomic mass

A

Average mass for atoms of that element

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10
Q

Units used for mass

A

Atomic mass unit (A.M.U) for atoms

Grams for other things

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11
Q

Units for volume

A

Liters L

Milliliters ML

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12
Q

Experimental variable

A

Thing being tested

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13
Q

Controlled variable

A

Things kept constant and controlled

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14
Q

Depending variable

A

Measured, recorded, counted
Depends on experimental variable
Y axis

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15
Q

Independent variable

A

Known before experiment
Includes experimental
X axis

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16
Q

Control set up

A

Normal
Doesn’t change anything
Used to compare results
New and old soap control is the old soap

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17
Q

If——–

Then——

A

If–prediction—-

Then—expected results—

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18
Q

How many meters in a kilometer

A

1,000

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19
Q

How many centimeters in a meter

A

100

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20
Q

How many mililiters in one meters

A

1,000

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21
Q

How many ML in a liter

A

1,000

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22
Q

How many milligrams in a gram

A

1,000

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23
Q

How many grams In a kilogram

A

1,009

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24
Q

Density formula

A

D = M divided by V

25
Q

How to find proton

A

Atomic #

26
Q

How to find electron

A

Neutral atom it’s the atomic number

Charge it is the charge number C-14 -1

27
Q

How to find neutrons

A

Mass #- atomic#

28
Q

Oxidation number

A

of electrons gained or lost to get full outer energy level. + because adding positive to get rid of the electron

29
Q

Period

A

Horizontal 1 to 7

30
Q

Columns

A

Groups, vertical, 1-18

31
Q

Valence electrons

A

Number of electrons in the outermost shell, the ones that interact

32
Q

Lewis for diagram

A
  • —-15
  • -4……..3
  • -8……..7
  • —-26
33
Q

Democratus

A

Named the atom

Big black dot for diagram

34
Q

Lavoisier

A

Wrote the law of conservation of matter

35
Q

Bohr

A

Found out that electrons formed different energy levels

Bohr diagram

36
Q

Chadwick

A

Discovered the neutron

37
Q

Mendeleev

A

First periodic table

38
Q

Thomson

A

Discovered the electron

Plum pudding model

39
Q

Rutherford

A

Solar system model

Discovered proton and nucleus

40
Q

Who used a cathode ray tube to see the path of praticles

A

Thomson

41
Q

When Thomson discovered negative particles this told him that

A

There where positive particles somewhere

42
Q

Who was the first person to see the smaller piece of matter was an atom

A

Democratus

43
Q

What is the most modern theory for the structure of an atom

A

Wave model

44
Q

Which families are most reactive

A

Alkali metals and alkaline earth metals are second

45
Q

Where is it easiest to steal electrons

A

Bottom left corner

46
Q

Metal location/ three l

A

Left
Large radius
Low ionization

47
Q

What metals are highly radioactive

A

Lanthanides and actinides

48
Q

Which family is inert

A

Nobel gases

49
Q

What metals have different oxidation numbers depending on environment

A

Transition metals

50
Q

Which non metals are highly reactive

A

Halogens, for salts

51
Q

How do you find valence electrons an element has using the periodic table

A

The ones place of the group number

52
Q

How does the periodic table tell how many energy levels an element has

A

The row number tells the number of energy levels

53
Q

What happens to the atomic radius as you move left to right across a period

A

Atomic radius decreases as you move across a row because the increasing number of protons increases the electromagnetic force that pulls the electrons close to the nucleus.

54
Q

What happens to atomic radius as you’ve too to bottom down a group

A

Atomic radius increases as you move down a group because the increasing number of energy levels increases the distance between the electrons and the nucleus.

55
Q

What happens to the ionization energy as you move left to right across a period

A

Ionization energy increases as you move across a row because the increasing number of protons increases the electromagnetic force that holds the electrons to the atom, making it more difficult to remove an electron.

56
Q

What happens to the ionization energy as you move top to bottom down a group

A

Ionization energy decreases as you move down a group because the increasing number of energy levels increases the distance between the electrons and the nucleus, decreasing the force of attraction and making the electrons easier to remove.

57
Q

What is ionization energy

A

Ionization energy is the amount of energy needed to remove the outermost electron. (ionizing the atom)

58
Q

What is electronegativity

A

Electronegativity is the amount of attraction that a nucleus has for electrons….how much electromagnetic force of attraction an atom generates

Block Science (33 decks)

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