Exam 1 Study Items

Question 2

Group IA is known as:

Answer 2

Alkali Metals

Question 3

Group IIA is known as:

Answer 3

Alkaline Earth Metals

Question 4

Group VIA is known as:

Answer 4

Chalcogens

Question 5

Group VIIA is known as:

Answer 5

Halogens

Question 6

Group VIIIA is known as:

Answer 6

Noble Gases

Question 7

What classification of matter is salt water?

Answer 7

Homogeneous mixture

You cannot distinguish the salt when it dissolves into Na+ and Cl- ions and evenly mixes with the water molecules.

In a homogeneous mixture, components are evenly distributed.

Question 8

What classification of matter is dry ice(CO₂)?

Answer 8

Pure substance

Dry ice is composed of one type of molecule, CO2, in a solid state.

Question 9

What classification of matter is bronze (a metal alloy)?

Answer 9

Mixture

Bronze is composed of copper and tin. While they mix together, they do not form a new chemical substance with a fixed ratio like a compound would.

Alloys are mixtures of 2 or more metals.

Question 10

Classify the following as either an extensive or intensive property:

Mass

Answer 10

Extensive

Question 11

Classify the following as either an extensive or intensive property:

Length

Answer 11

Extensive

Question 12

Classify the following as either an extensive or intensive property:

Density

Answer 12

Intensive

Question 13

Classify the following as either an extensive or intensive property:

Volume

Answer 13

Extensive

Question 14

Classify the following as either an extensive or intensive property:

Temperature

Answer 14

Intensive

Question 15

Classify the following as either an extensive or intensive property:

Color

Answer 15

Intensive

Question 16

Classify the following as either an extensive or intensive property:

Melting point (or any phase change temperature)

Answer 16

Intensive

Question 17

Going from a solid to a liquid is called?

Answer 17

Melting

Question 18

Going from a liquid to a solid is called?

Answer 18

Freezing

Question 19

Going from a liquid to a gas is called?

Answer 19

Vaporization
(boiling or evaporation)

Question 20

Going from a gas to a liquid is called?

Answer 20

Condensation

Question 21

Going from a solid to a gas is called?

Answer 21

Sublimation

Question 22

Going from a gas to a solid is called?

Answer 22

Deposition

Question 23

Charging a cell phone is an example of what kind of change?

Answer 23

Chemical

Question 24

What is the SI unit for amount of a substance?

Answer 24

Mole

Question 25

Which **subatomic particles** are found in the** nucleus of an atom**?

Answer 25

**Protons and neutrons**

Question 26

All atoms of a given element have the same:

Answer 26

**Number of protons**

Question 27

**Isotopes** of a given element vary in the:

Answer 27

**Number of neutrons**

Question 28

**Elements** in the **same group** have **what similar properties**?

Answer 28

**Physical and chemical**

Question 29

**Rows** on the **periodic table** are known as what?

Answer 29

**Periods**

Question 30

**Columns **on the **periodic table** are know as what?

Answer 30

**Groups (or families)**

Question 31

**True or False**: An element can be BOTH a molecule and a compound.

Answer 31

**False** Elements can form a molecule but it cannot be a compound.

Question 32

**True or False**: An element is only made up of one type of atom.

Answer 32

**True**

Question 33

**True or False**: An element can be a molecule.

Answer 33

**True**

Question 35

**True or False**: Atoms of an element cannot decompose into smaller substances.

Answer 35

True****

Question 36

The following are examples of what? **H, O, C, Na**

Answer 36

**Atoms** | Building blocks of matter.

Question 37

The following are examples of what? **C, O₂**

Answer 37

**Elements** | Elements are made of the same kind of atom.

Question 38

**O₂, NaCl, CO₂** These are examples of what?

Answer 38

**Molecules** | Made up of 2 or more atoms joined together.

Question 38

NaCl, CO₂ These are examples of what?

Answer 38

**Compounds**

Question 39

**True or False**: All compounds are molecules but not all molecules are compounds.

Answer 39

**True** | Molecules of the same element are not compounds.

Question 39

Classify the following substance as either an **element or a compound**: **Granite**

Answer 39

Neither. It's a **heterogeneous mixture**. | As an igneous rock, it is composed of several minerals.

Question 40

Classify the following substance as either an **element or a compound**: **Air**

Answer 40

Neither. It's a **heterogeneous mixture**. | Air is composed of several gases: N, O, Ar, CO2, etc.

Question 41

Which of the following substances is a **homegeneous mixture**? a. Granite b. Iced tea c. Orange juice with pulp d. Dry ice e. White gold

Answer 41

White gold | White gold is an alloy (can be mixed with Ni, Pd, Ag, Pt, Cu).

Question 42

Convert the following measure: **650 µL equals how many L**?

Answer 42

**0.000650 L** | 1 µL = 10^-6liters

Question 43

How do you convert from **Celcius to Kelvin**?

Answer 43

**°C + 273.15 = K**

Question 44

Which of the following is the **SI base unit for mass**? a. Ounce (oz) b. Pound (lb) c. Kilogram (kg) d. Gram (g)

Answer 44

**Kilogram (kg)**

Question 45

The SI unit for **density** is:

Answer 45

**g/cm³**

Question 46

Who is credited with **discovering the proton**?

Answer 46

**Ernest Rutherford**

Question 47

Who is credited with **discovering the electron by applying a potential through electrodes of an evacuated glass tube, thus forming a stream of electrons, or cathode rays**?

Answer 47

**J.J. Thomson**

Question 48

Who is credited with developing the ***Atomic Theory of Matter***?

Answer 48

**John Dalton**

Question 49

Who is credited with **calculating the charge and mass of an electron with his oil drop experiment**?

Answer 49

**Robert Millikan**

Question 50

Who is credited with **organizing the elements into what is now known as the Periodic Table**?

Answer 50

**Dmitri Mendeleev**

Question 51

Who is credited with determining that **atoms have a dense, positively charged nucleus by performing the alpha particle scattering experiment**?

Answer 51

**Ernest Rutherford**

Question 52

Who is credited with discovering the **charge-to-mass ratio of the electron**?

Answer 52

**J.J. Thomson**

Question 54

Building blocks of matter.

Answer 54

**Atoms**

Question 55

Made up of atoms of the same kind. Example: **O₂**

Answer 55

**Element**

Question 56

A particle composed of 2 or more atoms joined together. **Example: O₂, CO₂, NaCl**

Answer 56

**Molecule**

Question 57

Made up of 2 or more different kinds of atoms. **Example: CO₂, NaCl**

Answer 57

Compound