Aromic Theory And Periodic Table Flashcards Preview

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Flashcards in Aromic Theory And Periodic Table Deck (58):
1

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

An element

2

Subatomic

Smaller than an atom

3

All atoms of the same element have he same number of

Protons

4

An ion

An atom that has gained or lost electrons

5

An isotope

An atom that has a different number of neutrons

6

The charge of an atom is

Neutral

7

The charge of the nucleus is

Positive

8

How do you find mass number

Add protons and neutrons

9

Atomic mass

Average mass for atoms of that element

10

Units used for mass

Atomic mass unit (A.M.U) for atoms
Grams for other things

11

Units for volume

Liters L
Milliliters ML

12

Experimental variable

Thing being tested

13

Controlled variable

Things kept constant and controlled

14

Depending variable

Measured, recorded, counted
Depends on experimental variable
Y axis

15

Independent variable

Known before experiment
Includes experimental
X axis

16

Control set up

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

17

If--------
Then------

If--prediction----
Then---expected results---

18

How many meters in a kilometer

1,000

19

How many centimeters in a meter

100

20

How many mililiters in one meters

1,000

21

How many ML in a liter

1,000

22

How many milligrams in a gram

1,000

23

How many grams In a kilogram

1,009

24

Density formula

D = M divided by V

25

How to find proton

Atomic #

26

How to find electron

Neutral atom it's the atomic number
Charge it is the charge number C-14 -1

27

How to find neutrons

Mass #- atomic#

28

Oxidation number

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

29

Period

Horizontal 1 to 7

30

Columns

Groups, vertical, 1-18

31

Valence electrons

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

32

Lewis for diagram

-----15
--4........3
--8........7
-----26

33

Democratus

Named the atom
Big black dot for diagram

34

Lavoisier

Wrote the law of conservation of matter

35

Bohr

Found out that electrons formed different energy levels
Bohr diagram

36

Chadwick

Discovered the neutron

37

Mendeleev

First periodic table

38

Thomson

Discovered the electron
Plum pudding model

39

Rutherford

Solar system model
Discovered proton and nucleus

40

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

Thomson

41

When Thomson discovered negative particles this told him that

There where positive particles somewhere

42

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

Democratus

43

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

Wave model

44

Which families are most reactive

Alkali metals and alkaline earth metals are second

45

Where is it easiest to steal electrons

Bottom left corner

46

Metal location/ three l

Left
Large radius
Low ionization

47

What metals are highly radioactive

Lanthanides and actinides

48

Which family is inert

Nobel gases

49

What metals have different oxidation numbers depending on environment

Transition metals

50

Which non metals are highly reactive

Halogens, for salts

51

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

The ones place of the group number

52

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

The row number tells the number of energy levels

53

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

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

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

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

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

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

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

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

What is ionization energy

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

58

What is electronegativity

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