Module 4

Question 1

Standard average

Answer 1

Sum of all divided by quantity
(A + B ) / 2

Question 2

Weighted average

Answer 2

Summation of percent by total . Percents must equal 100%
.80 (100) + .20 (359) =151.8

Question 3

Subatomic particles categories

Answer 3

Neutrons , protons, and electrons

Question 4

Nucleus size / mass

Answer 4

1/10,000 of a atom but is most of the atoms mass

Question 5

Atomic Mass unit

Answer 5

u , weighs about 1.661 x 10 ^ 27

Question 6

Subatomic properties

Answer 6

Protons (+1), Electrons (-1), Neutrons (0) .
Charge is defined as
-1.6 x 10 ^ -19 c = e

Question 7

Relative sizes

Answer 7

Electron > proton/neutron
Nucleus > Atom

Question 8

Atomic number

Answer 8

Symbol : Z (top # in table)
Is the number of protons in the nucleus

Question 9

Protons

Answer 9

Determines the identity of the atom , electrons can change and it won’t effect the proton (-1)
Weighs 1.0073 u

Question 10

Isotopes

Answer 10

The number of neutrons varies , but has the same number of protons and atomic number. Can be identified by the mass number

Question 11

Neutrons

Answer 11

Determines the mass of the atom . If it changes it becomes a isotope
Weighs 1.0087 u

Question 12

Mass number

Answer 12

The combination of :
Atomic number + Neutron
Proton + Neutron

Question 13

Ions

Answer 13

The gaining or losing of electrons in atoms . Separated into Anions or Cations

Question 14

Anion

Answer 14

When the atom gains electrons it becomes a negative charge.

Question 15

Cation

Answer 15

When the atom loses electrons it becomes a positive charge .

Question 16

Atomic Mass scale

Answer 16

Initially : Compared to Oxygen (O) which was 16 mass Units
Currently : Compared to Carbon (C - 12) with 12 mass units

Question 17

Artificial Elements

Answer 17

All elements whose atomic number is greater then 92. The most stable isotope is shown on the table . Does not contribute to mass for natural elements

Question 18

Periodic table structure

Answer 18

Similar characteristics are grouped
Vertical is properties, Horizontal is atomic number

Question 19

Creators of periodic table

Answer 19

Dimitri mandeleev and Lother Mayer

Question 20

Periods on periodic table

Answer 20

The rows of the table

Question 21

Groups / Families of the table

Answer 21

The vertical column on the table

Question 22

1st Group / Family

Answer 22

The alkali metals , excluding hydrogen
(Contains +1 charge)

Question 23

2nd Group / Family

Answer 23

Alkaline Earth Metals
(Contains +2 charge)

Question 24

11th Group / Family

Answer 24

Known as the coinage family Consists of only
Copper (Cu) , Silver (Ag) and Gold (Au)

Question 25

17th Group / Family

Answer 25

Halogen elements (Contains -1 charge)

Question 26

18th Group / Family

Answer 26

Noble gasses (The perfects) Odorless and dont really react Illuminates with voltage

Question 27

The main group of elements

Answer 27

Consists of groups 1 , 2 , 13 -> 19

Question 28

Transitional groups

Answer 28

Consists of transitional metals Groups 3 -> 12

Question 29

Inner transition elements

Answer 29

The elements in the separate box Not much is really knows about them

Question 30

Chemical Nomenclature definition

Answer 30

The systemic approach of naming compounds

Question 31

Chemical formula definition

Answer 31

Combining elements into a new compound Fe + O = FE2O3

Question 32

Subscripts in elements

Answer 32

Represents how many of something there is Ex Br2 = 2 bromine are present

Question 33

Molecular compounds (or covalent bonds)

Answer 33

A compound with 2 or more nonmetals NaCl = Sodium + Chlorine

Question 34

Ionic Compounds

Answer 34

Exist in 3d structures Made of a metal and non metal atom Ex Fe + O = Iron (II) Oxygen

Question 35

Diatomic Elements (7 of them)

Answer 35

Elements that only exist in pairs Hydrogen (H), Nitrogen (N), Oxygen (O), Fluorine (F), Chlorine (C), Bromine (Br), Iodine (I)

Question 36

Allotropes

Answer 36

Different forms of elements , structural change Ex. Oxygen , molecular form is O2, 1 more O and its Ozone is O3.

Question 37

Binary Covalent Compounds

Answer 37

Bonds in ratios Naming : prefix + element Ex . N2O is Dinitrogen Monoxide OF2 is Oxygen Difluoride

Question 38

Prefix for 1

Answer 38

Mon (o) (Sometimes drop letter)

Question 39

Prefix for 2

Answer 39

Di

Question 40

Prefix for 3

Answer 40

Tri

Question 41

Prefix for 4

Answer 41

Tetra

Question 42

Prefix for 5

Answer 42

Pent (a) (Sometimes drop letter)

Question 43

Prefix for 6

Answer 43

Hex (a) (Sometimes drop letter)

Question 44

Prefix for 7

Answer 44

Hept (a) (Sometimes drop letter)

Question 45

Prefix for 8

Answer 45

Oct (a) (Sometimes drop letter)

Question 46

Prefix for 9

Answer 46

Non (a) (Sometimes drop letter)

Question 47

Prefix for 10

Answer 47

Dec (a) (Sometimes drop letter)