Chemistry Midterm

Question 0

The branch of chemistry that studies the composition of matter is organic.

Answer 0

False

Question 1

Pure chemistry is the use of data and research to attain products which improves our lives

Answer 1

False

Question 2

Applied chemistry is concerned with the acquiring of knowledge.

Answer 2

False

Question 3

A person who studies carbon compounds is in which field of study?

Answer 3

Organic

Question 4

What was a major contribution to chemistry by Antoine Lavoiser?

Answer 4

Law of conservation of mass; he showed that oxygen is required for material to burn.

Question 5

Which step in the scientific method requires you to use your senses to obtain information?

Answer 5

Making an observation

Question 6

Studying the amount of light given off from distant stars

Answer 6

Pure Chem

Question 7

Explaining why alcohol burns and water does not

Answer 7

Pure Chem

Question 8

Developing a drug which does not cause nausea to be used in chemotherapy.

Answer 8

Applied chem

Question 9

Producing a fabric which is resistant to bullet entry

Answer 9

Applied Chem

Question 10

Designing a new method of injecting insulin to diabetics

Answer 10

Applied Chem

Question 11

Which would chemist mostly study?
A. Leaf on water
B. Leaf changing color
C. Leaf making music
D. Leaf blown in the wind

Answer 11

B

Question 12

Heterogeneous mixture

Answer 12

Not uniform in composition.

Question 13

Distillation

Answer 13

A process in which a substance is separated by difference in boiling point

Question 14

Homogenous mixture

Answer 14

Describes mixture with a uniform composition

Question 15

Which is a physical change?
A. Digestion
B. Explosion
C. Evaporation
D. Rotting of food

Answer 15

C

Question 16

What is a heterogeneous mixture?
A air
B salt water
C steel
D dirt

Answer 16

D

Question 17

Which is a homogenous mixture?
A. Salt water
B. Beef stew 
C. Sand and water
D. Soil

Answer 17

Soil

Question 18

Separating a solid from a liquid by evaporating the liquid is called…

Answer 18

Distillation

Question 19

The first figure in a properly written chemical symbol always is

Answer 19

Capitalized

Question 20

If the equation from question #41 started with 50.0 gms on the left n there was 50.0 gms on the right, which law is this proving?

Answer 20

Law of conservation of mass

Question 21

A solid formed from a chemical combination of two liquids is called?

Answer 21

Precipitate

Question 22

If you are given a substance in lab and heat, then electricity and finally acid is applied with no change in composition, you could conclude that is substance is a…

Answer 22

Element

Question 23

Precision

Answer 23

Repeated agreement is to accepted value

Question 24

Accuracy

Answer 24

How close a measurement is to accepted value

Question 25

Density

Answer 25

Amount of matter divided by amount of space

Question 26

The expression of 5008 km in sci notation is…

Answer 26

5.008 x 10^3

Question 27

Mass

Answer 27

Gms

Question 28

Liquid volume

Answer 28

Milliliters

Question 29

Time

Answer 29

Second

Question 30

Distance

Answer 30

Meter

Question 31

Temperature

Answer 31

Celsius

Question 32

Solid volume

Answer 32

Cm3

Question 33

What is the SI unit for mass?

Answer 33

Kilograms

Question 34

What is the quantity 0.0075 m expressed in centimeter?

1m=100cm

Answer 34

.75cm

Question 35

The smallest particle if an element that retains the properties of that element

Answer 35

Atom

Question 36

A positively charged subatomic particle

Answer 36

Proton

Question 37

A negatively charged subatomic particle

Answer 37

Electron

Question 38

A subatomic particle with no charge

Answer 38

Neutron

Question 39

The central part of an atom, containing protons n neutrons

Answer 39

Nucleus

Question 40

The total number of protons and neutrons in the nucleus if an atom

Answer 40

Atomic mass

Question 41

The average of the masses of the isotopes if an element

Answer 41

Period mass number

Question 42

Who was the man who lived from 460 BC - 370 BC and was among to suggest the idea of atoms

Answer 42

Dalton

Question 43

Dalton’s atomic theory included

Answer 43

Atoms of the same element are always identical

Question 44

Who conducted experiments to determine the amount of charge carried by an electron?

Answer 44

Millikan

Question 45

Who discovered the neutron?

Answer 45

Chadwick

Question 46

20/10E

Answer 46

Mass on top
Proton on the bottom
Isotope is the proton

Question 47

Tendency of electrons to enter orbitals of lowest energy first

Answer 47

Aufbau principle

Question 48

When electrons enter orbital they tend to spread out

Answer 48

Hunds rule

Question 49

Each orbital has at most two electrons with opposite spins

Answer 49

Paulis exclusion principle

Question 50

Scientist who stated that electrons circle atomic nucleus like planets

Answer 50

Bohr

Question 51

Scientist whose mathematical equation gave locations of electrons

Answer 51

Schrodinger

Question 52

If the spin if one electron in an orbital is clockwise, what is the spin of the other electron in that orbital?

Answer 52

Counterclockwise

Question 53

After the 4s orbital, which are the next to be filled

Answer 53

3d

Question 54

Lithium

Answer 54

Red

Question 55

Potassium

Answer 55

Violet

Question 56

Sodium

Answer 56

Yellow

Question 57

Copper

Answer 57

Green

Question 58

Which radiation has the highest energy

Answer 58

Xray

Question 59

Today’s modern period table is arranged in order of increasing atomic…

Answer 59

Number

Question 60

Mendeleev

Answer 60

Scientist who left blanks on periodic table

Question 61

Democritus

Answer 61

First defined the atom