Digital Lesson 3.3

Question 1

When matter if chemically rearranged it changes into a

Answer 1

New substance

Question 2

After a reaction the properties of the new substance

Answer 2

Are different from the properties of the original substance

Question 3

3 signs a chemical reaction may have occurred

Answer 3

Gas and release of heat and light

Question 4

Chemical change

Answer 4

Bonds between atoms break and the atoms rearrange

Question 5

The atoms them self don’t change and

Answer 5

There is the same amount of matter after the reaction as there was before

Question 6

Rutherford said the atom is what percent empty space

Answer 6

99.99% empty space

Question 7

What determine how easy an atom can form chemical bonds with other atoms

Answer 7

Valence electrons

Question 8

Chemical bond

Answer 8

Interaction that holds atoms or ions together

Question 9

Ionic

Answer 9

Metal+nonmetal

Question 10

Convalent

Answer 10

Nonmetal+nonmetal

Question 11

Ion

Answer 11

Positive and negative charges aren’t equal(electrons)

Question 12

Ionic and Convalent: transfer or share

Answer 12

Ionic: transfer
Convalent: share

Question 13

Ionic and Convalent: valence numbers( close or far apart)

Answer 13

Ionic: far apart
Convalent: close together

Question 14

Ionic and Convalent: simple or complex

Answer 14

Ionic: simple
Convalent: some simple, some complex

Question 15

Ionic and Convalent: physical properties

Answer 15

Ionic: crystal lattice, brittle, often soluble
Convalent: not a crystal lattice because there is no ions, not brittle, usually soluble

Question 16

What is crystal lattice

Answer 16

Opposites
Ex:
\+-+-+-+-
-+-+-+-+
\+-+-+-+-

Question 17

Ionic and Convalent:melting point

Answer 17

Ionic: high melting point
Covalent: low melting point

Question 18

Ionic and Convalent: conduction of electricity

Answer 18

Ionic: good conductors
Covalent: poor conductors

Question 19

Ionic and Convalent: physical state

Answer 19

Ionic: solid
Convalent: any state

Question 20

Isotope

Answer 20

Same number of protons, different number of neutrons

Question 21

Ionic and covalent: molecule of ion

Answer 21

Ionic: ion
Covalent: molecule

Question 22

A candle that was solid then melted would be…..

Answer 22

Covalent

Question 23

The force of attraction between bonds in molecules is much stronger then the bonds between oppositely charged ions in a crystal lattice

Answer 23

False

Question 24

How many elements and atoms are found in C19H19N7O6

Answer 24

4 elements, 51 atoms

Question 25

Atom

Answer 25

Neutral

Question 26

Diatomic molecule

Answer 26

2 diatomic elements bonded together

Question 27

What determines how an atom reacts

Answer 27

Electrons

Question 28

Period

Answer 28

Same number of rings

Question 29

Why do ionic bonds have a higher melting point then covalent bonds

Answer 29

Stronger crystal lattice

Question 30

Do noble gases bond to anything

Answer 30

No because the have 8 valence electrons

Question 31

Alkaline earth metals charge

Answer 31

2+ charge- 2 valence electrons

Loses 2 electrons