Chemistry Final

Question 1

Density

Answer 1

The ratio of mass to volume

Question 2

Conversion Ladder

Answer 2

Kilo, Hecto, Deka, Base Unit, Deci, Centi, Milli

Question 3

Sig fig rules

Question 4

What are the two types of compounds

Answer 4

Covalent and Molecular

Question 5

Ionic bonds occur when

Answer 5

Atoms transfer electrons

Question 6

Atoms that gain electrons get a ____ charge

Answer 6

Negative

Question 7

Metals form ions with a ____ charge

Answer 7

Positive

Question 8

What are crystals

Answer 8

Large groups of positive and negative ions in a repeating pattern

Question 9

When do molecular compounds form

Answer 9

When non metals bond together

Question 10

What compounds have high melting points

Answer 10

Ionic compounds

Question 11

What compounds are good conductors

Answer 11

Ionic compounds

Question 12

What is an empirical formula

Answer 12

The smallest whole number ratio from + and - ions in an ionic compound

Question 13

What is a chemical formula

Answer 13

Tells the makeup of a compound

Question 14

What is a molecular formula

Answer 14

The exact makeup of 1 molecule

Question 15

Proton

Answer 15

Located in the nucleus, positive charge

Question 16

Neutron

Answer 16

Located in nucleus, no charge

Question 17

Electron

Answer 17

Located in cloud around nucleus, negative charge

Question 18

Atomic Number

Answer 18

Top left of element, number of protons and neutrons

Question 19

Atomic mass

Answer 19

Bottom of element, number of electrons

Question 20

Mixture

Answer 20

Two or more compounds not chemically linked

Question 21

Mass number

Answer 21

Equal to the number of protons + neutrons the atom has

Question 22

Atomic mass definition

Answer 22

Weighted average of the masses and their different isotopes

Question 23

4 points of Daltons theory

Answer 23

All elements made of different elements
All things made of atoms
Atoms can change physically
Chemical reactions are when atoms change

Question 24

Rutherford gold foil experiment

Answer 24

Rutherford shot small particles at gold foil which had a positive charge. The particles wine through showing atoms are mostly empty space, but they bounced off the nucleus showing the nucleus is positive

Question 25

Vertical column on periodic table

Answer 25

Group

Question 26

Who first arranged periodic table

Answer 26

Mendelev

Question 27

Who changed periodic table to be in order of increasing atomic number

Answer 27

Mosley

Question 28

The size of an atom is due to

Answer 28

The number of occupied energy levels

Question 29

As you move from left to right, the size of the atomic radius will

Answer 29

Decrease

Question 30

As you move down a group, the size of the atoms will

Answer 30

Increase

Question 31

Ionization energy

Answer 31

Amount of energy needed to remove electrons

Question 32

Ionization energy needed increases as you move

Answer 32

Across and down .

Question 33

The size of a positive ion is always _____ than the size of the neutral atom

Answer 33

Smaller

Question 34

The size of a negative ion is always _____ then the size of the neutral atom

Answer 34

Larger

Question 35

Properties of ionic bonds

Answer 35

High melting points, dissolve in water, and conduct electricity as liquids and gases

Question 36

Properties of covalent bonds

Answer 36

Low melting points and no conductivity

Question 37

Properties of metallic bonds

Answer 37

High melting points and good conductors

Question 38

Properties of Alkali metals

Answer 38

Low melting points, Very reactive, silver

Question 39

Properties of alkaline earth metals

Answer 39

Good conductors, 2 valence electrons, 2nd most reactive

Question 40

Properties of Halogens

Answer 40

Toxic, highly reactive and electronegative, and have 7 valence electrons

Question 41

Properties of noble gases

Answer 41

Non reactive, low electronegativity, low boiling points, 8 valence electrons

Question 42

Transition metals

Answer 42

Good conductors, high melting points, 2 valence electrons

Question 43

Properties of Metals

Answer 43

High melting points, good conductors, high density, malleable

Question 44

Properties of nonmetals

Answer 44

Bad conductors, not malleable, low density

Question 45

Electronegativity

Answer 45

The tendency to attract electrons towards itself

Question 46

How does electronegativity get stronger

Answer 46

As you move up and right on the table

Question 47

Atomic radius

Answer 47

Size of the atom, gets stronger as you move left and down

Question 48

How does Ionization energy get stronger

Answer 48

As you move up and right on the table

Question 49

Octet rule

Answer 49

All elements need 8 valence electrons in the outer shell

Question 50

What is distillation

Answer 50

Purifying a liquid by heating or cooling