Exam

Question 1

What is chemistry

Answer 1

Chemistry is the study of the periodic table; of the different changes that can occur to a substance when acted upon by something else.

Question 2

Scientific Theory

Answer 2

A detailed and elaborate explanation for a set of apparently unrelated facts or observations

Question 3

Scientific law

Answer 3

A principle or pattern observed in nature and commonly expressed mathematically

Question 4

Solid

Answer 4

Has a fixed shape, mass and volume

Question 5

Liquid

Answer 5

Has a fixed mass and volume but not shape

Question 6

Gas

Answer 6

Has a fixed volume but not shape or mass

Question 7

Compound

Answer 7

A substance comprised of two or more elements chemically combined

Question 8

Element

Answer 8

Any substance that cant be broken down by chemical processes into two or more simpler substances

Question 9

Molecule

Answer 9

A particle made up of individual atoms, chemically combined, functioning as a whole, independent unit of matter

Question 10

Mixture

Answer 10

Two or more kinds of pure matter who are physically combined

Question 11

Atom

Answer 11

The tiniest individual particle of an element, having the same chemical properties as the bulk element

Question 12

Atomic number

Answer 12

tells us the number of protons present in the nucleus of an atom of the element

Question 13

Conversion factor

Answer 13

A ratio of two equivalent quantities

Question 14

Chemical Formulas

Answer 14

A list of specific elements making up the substances

Question 15

ISOTOPES

Answer 15

Atoms with the same number of protons but different numbers of neutrons

Question 16

RADIOISOTOPES

Answer 16

An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable

Question 17

Atomic Radius

Answer 17

This is the radius in which electrons can reside, the more electrons the bigger the radius until a stable octet is formed

Question 18

Ionic radius

Answer 18

Occurs when a valence electron is removed from an atom of lithium, a lithium ion is formed, this has an ionic radius smaller than the atomic radius of the neutral lithium atom because there is one fewer electron shell

Question 18

Ionization energy

Answer 18

The energy needed to lose an electron

Question 19

electronegativity

Answer 19

A measurement from 0-4 that measures the attraction an atom has for electrons

Question 20

S-orbital

Answer 20

Spherical in shape There are one s-orbitals in each energy level There are a total of two electrons i each one

Question 21

P-orbital

Answer 21

Propeller shaped: There are three different p orbitals, The p-orbitals start in energy level 2 Each p-orbital can hold 2 electrons for a total of six

Question 22

D-orbitals

Answer 22

Donut or dumbbell shaped
There are 5 d-orbitals starting with energy level 3
Each can hold 2 electrons for a total of 10

Question 23

F-Orbital

Answer 23

Funny shaped
Seven f-orbitals start with energy level 3.
Each can hold 2 electrons for a total of 14.

Question 24

Chemical bonds

Answer 24

The forces of attraction holding atoms or ions together

Question 25

Formula unit:

Answer 25

The simplest whole number ratio of atoms or ions of the element in an ionic compound

Question 26

Crystal lattice

Answer 26

A regular, ordered arrangement of atoms, ion, or molecules

Question 27

Stable octet

Answer 27

a full shell of eight electrons in the outer energy level of an atom

Question 28

Ionic Halid:

Answer 28

A compound between a metal and a halogen. (Sodium Chloride )

Question 29

Solubility

Answer 29

A measure of how much one thing can dissolve in another

Question 30

Bronsted Lowry Acids and Bases

Answer 30

Bronsted Lowry acids are Proton Donors B-L bases are proton acceptor

Question 31

Amphoteric

Answer 31

An ion that can exist as an acid or a base depending on what its reacting with

Question 32

Titration

Answer 32

process of chemical analysis in which the quantity of some constituent of a sample is determined by adding to the measured sample an exactly known quantity of another substance with which the desired constituent reacts in a definite, known proportion

Question 33

Cu 2

Answer 33

Flame: Blue or Green, soln: Blue

Question 34

Co2

Answer 34

Soln: Pink

Question 35

Fe 2

Answer 35

Soln: pale blue

Question 36

Mn 2

Answer 36

Soln: pale Pink

Question 37

Fe 3

Answer 37

Soln: Yellow-Brown

Question 38

Ni

Answer 38

Soln: Green

Question 39

LI

Answer 39

Flame: Bright red

Question 40

Na

Answer 40

Flame: Yellow

Question 41

K

Answer 41

Flame: Violet

Question 42

Ca2

Answer 42

Flame: Yellow red

Question 43

Sr2

Answer 43

Flame: Bright red