Unit 2 Chemistry Test

Question 1

What is matter?

Answer 1

Matter is anything that occupies space

Question 2

What is a Pure substance?

Answer 2

made up of only one kind of matter and has a unique
set of properties. They can be elements or compounds

ex.gold,sliver

Question 3

What is a mixture?

Answer 3

matter that contains more than one type of particle

ex.salad dressing

Question 4

What is an element?

Answer 4

a pure substance that cannot be broken down by any physical or chemical means into simpler substances

ex. soduim

Question 5

What is a compund

Answer 5

two or more elements chemically bonded together.

(ex.
sodium chloride – NaCl, methane – CH 4 )

Question 6

What is malleability?

Answer 6

is the ability of a substance, usallys metals to be deformed or molded to different shapes

Question 7

What is Viscocity?

Answer 7

resistance of a fluid

Question 8

What is soluability?

Answer 8

a degree of which a substance dissloves in a slovent

ex. sugar and water can be recovered

Question 9

What is density?

Answer 9

is the amount of matter per unit volume

Question 10

What is conductivity?

Answer 10

power of conducting heat, electricity, or sound

Question 11

What is a proton?

Answer 11

a particle with a positive electric charge and found in the nucleoous

Question 12

What is a neutron?

Answer 12

a particle that is in the nucleous and has no charge

Question 13

what is an electron?

Answer 13

it is a particle outside the nucleous and has a negative charge

Question 14

What is an isotope?

Answer 14

isotopes are a type of atom, the smallest unit of matter that retains all the chemical

Question 15

What is an inoic bond?

Answer 15

which one atom loses valence electrons and gains them from another

Question 16

What is an colvent bond?

Answer 16

when electrons are shared between two atoms

Question 17

What is a molecular compond?

Answer 17

compounds held together by covalent bonds

Question 18

What is a Diatomic element?

Answer 18

There are 7. hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), bromine (Br), and iodine (I)

Question 19

What is the different between a pure substance and a mixture?

Answer 19

A pure substance has one particles while the mixture has more than one type

Question 20

What is the difference between an element and a compound?

Answer 20

An element has one type of atom while compund are formed of two or more different element.

Question 21

What is the 5 things in particle theorie?

Answer 21

• all matter is made up of tiny particles
• each pure substances has its own type of particle
• particle attract eachother
• always moving
• particles at a higher tempature move faster than ones at a colder tempature

Question 22

What are the states of matter?

Answer 22

• solid
• liquid
• gas

Question 23

What is the different between qualitative and quantitated?

Answer 23

Qualitative are descriptive and quantitative are measured.

Question 24

What is Homogeneous mixtures?

Answer 24

are solutions and have a uniform
composition.

ex.kool aid

Question 25

what is Heterogeneous mixtures:?

Answer 25

different parts of the mixture are visible | ex. salad dressing

Question 26

Different physical properties?

Answer 26

- colour - taste - texture - odour

Question 27

What does it mean when something is insouluble?

Answer 27

incapable of being dissolved in a liquid and especially water.

Question 28

Different chemical properties?

Answer 28

reactivity: -water - acid - another pure substance - oxygene

Question 29

What is Daltons model of an atoms?

Answer 29

It stated that all matter was made up of small, indivisible particles known as 'atoms'.

Question 30

What is the gold foil experiment?

Answer 30

A piece of gold foil was hit with alpha particles, which have a positive charge. Most alpha particles went right through. This showed that the gold atoms were mostly empty space.

Question 31

What makes up the nucleous?

Answer 31

protons, which are positively charged, and neutrons, which are electrically neutral.

Question 32

# What What are 3 trends in the periodic table?

Answer 32

- As you go from right to left along a row, the number of electrons increases by one. - As you go down a column, the number of “shells” increases by one. All of the elements in the same column, have the same number of electrons in their outermost shell

Question 33

Determine what gas is produced in a chemical reaction using a splint test

Answer 33

When a burning splint is introduced to a sample of pure hydrogen gas, it will burn with a popping sound.

Question 34

What is the different between a period and a group?

Answer 34

A period is a horizontal row of the periodic table and a group is the vertical coloums

Question 35

What are the properties of an ionic compound?

Answer 35

- Metal& non metal - ionic bond - good conductor - soluble(dissolves better

Question 36

What are the properties of a molecular?

Answer 36

- 2 non metals - covenlent(shares electrons) - poor conductor - non soluable

Question 37

Name 2 ionic compounds and how to draw them?

Answer 37

- Soduim Cholride- NaCl - tetrapotassium mononitride- K3N

Question 38

Name 2 Molecular Compounds and how to draw them?

Answer 38

- Carbon dixoxide CO2 - Disulfur dioxide S2O2

Question 39

what is Tompson model of an atom?

Answer 39

All atoms contain tiny negatively charged subatomic particles or electrons.

Question 40

What is Rutherford model of the atom?

Answer 40

An atom consists of positively charged particles concentrated at the center known as the nucleus.

Question 41

What is Borh's model of the atom?

Answer 41

The electrons encircle the nucleus of the atom in specific allowable paths called orbits

Question 42

Correctly write the number of atoms in Berylium phosphide?

Answer 42

Be3P2

Question 43

Correctly write the number of atoms in Sodium Oxide?

Answer 43

Na2O

Question 44

Correctly write the number of atoms in Litium Cholride?

Answer 44

LiCl

Question 45

Correctly write the number of atoms in Potassium bromide?

Answer 45

KBr

Question 46

Correctly write the number of atoms in Magnesium sulfide? | make sure to simplify if possible

Answer 46

MgS

Question 47

Look at a chart!!!!

Question 48

Draw Carbon hydride?

Answer 48

look on lesson 10

Question 49

Draw Hydrogen Oxide?

Answer 49

Answer on page

Question 50

Sulfur and hydride?

Answer 50

Answer on page

Question 51

Name the molecular molecules: -CO -CO2 -NH3 -H2O -OCl2

Answer 51

on page

Question 52

Write out: - Nitrogen monoxide - Carbon tetrahydride - Silicon tetrabromide - Boron trihydride

Answer 52

- NO - Ch4 - NO5 - SBr4 - BH3

Question 53

Write the formulas for: - Lithium Flurorine - Sodium nitrogen - cacluicm bromine - aluminum nitrogen

Answer 53

- LiF(litium and floride) - CaBr2(Calicum bromide) - Na3N(sodium Nitride) - AlN(Aluminum Nitride)

Question 54

# 5 Write the formulas: - Sodium Iodide - Beryllium floride - Magnesium Oxide - Berylium fluoride - Alumimum sulfide

Answer 54

- NaI - BeF2 - MgO - Al2S3