Chem Exam

Question 1

Chemistry

Answer 1

Science that studies the composition, structure, properties, and change of matter

Question 2

Subatomic particles

Answer 2

Protons, neutrons, electrons

Question 3

How to find the number of protons:

Answer 3

Atomic #

Question 4

How to find the number of neutrons

Answer 4

Mass # - atomic #

Question 5

How to find # of electrons

Answer 5

Atomic #

Question 6

Name the chemical families from left to right

Answer 6

Alkali metals
Alkaline earth metals 
Transition metal family 
Boron 
Carbon 
Nitrogen
Calcogen
Halogen 
Noble gas

Question 7

What are rows called on the periodic table?

Answer 7

Periods

Question 8

What are columns called on the periodic table?

Answer 8

Chemical families

Question 9

What are valence shells?

Answer 9

Outer shell of any atom

Question 10

What are metals and where are they found?

Answer 10

The transfer electrons

Question 11

What are non-metals?

Answer 11

They gain electrons

Question 12

What family is the most reactive?

Answer 12

Alkali metals

Question 13

What are stable octects?

Answer 13

Octect rule- elements gain or loose electrons to attain an electron configuration of the nearest noble gas

Question 14

What family is considered to be the most stable and why?

Answer 14

Noble gases because they have all their outer electron shells filled

Question 15

What is matter? 3 states of matter?

Answer 15

Anything that has mass and takes up space

• solid
• liquid
• gas

Question 16

Elements

Answer 16

Made entirely from one type of atom

Question 17

Compound

Answer 17

A molecule that contains at least 2 elements

Question 18

3 different types of compounds:

Answer 18

• acids
• ionic compounds
• molecular compounds

Question 19

What info does a Bohr model show?

Answer 19

• the amount of shells an element has
• you can tell how reactive an element is
• shows electrons, neutrons, protons

Question 20

Ion

Answer 20

Charged atom

Question 21

Cation

Answer 21

Positive charged ion

Question 22

Anion

Answer 22

Negatively charged ion

Question 23

Combining capacity

Answer 23

The number of electrons elements lose, gain or share to create a full valence shell

Question 24

Atoms that loose electrons are…

Answer 24

Positive

Question 25

What is an ionic compound?

Answer 25

When metals react with non metals, electrons are transferred from the metal atom to the non metal atom forming ions

Question 26

What is an ionic bond?

Answer 26

A strong electrostatic force of attraction between metal and non metal atoms

Question 27

What are metalloids

Answer 27

They have the least amount of elements

Question 28

What it mean for an element to be reactive

Answer 28

Elements that are short one or two electrons or have an extra electron from a valence shell are very reactive

Question 29

What are metalloids

Answer 29

They have the least amount of elements

Question 30

What it mean for an element to be reactive

Answer 30

Elements that are short one or two electrons or have an extra electron from a valence shell are very reactive

Question 31

Why do non metals need to bond with metals?

Answer 31

To get a full valence she'll

Question 32

Stock system

Answer 32

The elements in a compound indicated by Roman numerals

Question 33

How do you find the charge of an anion when dealing with multitalented metals?

Answer 33

Identify each ion and its charge, determine total charges needed to balance positive and negative

Question 34

Multivalent metal

Answer 34

An ion with multiple charges, using Roman numerals to show charge

Question 35

Covalent

Answer 35

A chemical bond that involves the sharing it electron pairs between atoms

Question 36

Molecular

Answer 36

Same as covalent

Question 37

Polyatomic ions

Answer 37

2 or more atoms covalently bonded

Question 38

What is the law of conservation of mass?

Answer 38

Neither created or destroyed by chemical reactions or physical transformation

Question 39

Word equation

Answer 39

Written representation of a chemical reaction

Question 40

Skeletal equation

Answer 40

Way of using formulas to indicate the chemicals that were involved in a chemical reaction

Question 41

Balanced chemical equation

Answer 41

Shows that the chemical reaction need to be balanced

Question 42

Ammonia

Answer 42

NH4

Question 43

Hydrogen peroxide

Answer 43

H2 O2

Question 44

5 major reaction types

Answer 44

- double replacement - single replacement - combustion - synthesis - decomposition

Question 45

pH stands for...

Answer 45

Power hydrogen