Chem MidTerm

Question 1

Percent error equation

Answer 1

mesured-actual/acual x 100

Question 2

Chemistry

Answer 2

The study of matter and the changes it undergoes

Question 3

Percent prescion equation

Answer 3

range/2/averagex100

Question 4

Measurements and units

Answer 4

King(Kilo) Henry (Helio) Died(Deko) By(Base) Drinking(Deci) Choclate(Centi) Milk(Mili)

Question 5

Matter

Answer 5

Anything that has mass and takes up space

Question 6

Density

Answer 6

mass/volume

Question 7

Chemical Properties

Answer 7

How one substances chemically reacts with another

Question 8

Physical Properites

Answer 8

Density, melting point, boiling point, solubility

Question 9

Pure Substance

Answer 9

all the particles are identical to the other particles in the substance

Question 10

Mixture

Answer 10

one or two kinds of particles in a substance

Question 11

Element

Answer 11

one type of atom

Question 12

Compound

Answer 12

Molecules contain more than one type of mixture: still pure substance

Question 13

Homogenous

Answer 13

mixed evenly throughout

Question 14

Heterogenous

Answer 14

seperated throughout

Question 15

Proton

Answer 15

In nuecules, postive, 1 AMU

Question 16

Nuetron

Answer 16

in nueculus, nuetral, 1 AMU

Question 17

Electron

Answer 17

Outside nueclus, negative, almost 0 Mass

Question 18

Atomic #

Answer 18

number of protons in nueclus

Question 19

Mass #

Answer 19

number of protons + nuetrons in nueculus

Question 20

Ion

Answer 20

an atom with an electral charge

Question 21

Radioactivity

Answer 21

The decompostion of th enuclei by realising particles or rays

Question 22

Fission

Answer 22

spilting of an atom

Question 23

Fusion

Answer 23

Combing of a nuclei into larger nuclei

Question 24

Ionizing Radiation

Answer 24

Radition that carries enough energy to ionize atoms

Question 25

Alpha Decay

Answer 25

The emission of an alpha particle from the nucelus of an atom 4/2 He

Question 26

Beta Decay

Answer 26

The emmission of an electron from the nucleus of an atom 0/-1 e

Question 27

Gamma Radiation

Answer 27

The emmission of electromagnetic radiation from the nuceleus of an atom 0/0 y

Question 28

Photon

Answer 28

A light that comes when electrons return from their excited state

Question 29

quantum

Answer 29

an amount of energy electrons hold

Question 30

energy levels (occurding to bohr)

Answer 30

The different orbitals electrons are on

Question 31

Ionization energy trend

Answer 31

increases up and across (to the right) the periodic table

Question 32

Rutherford

Answer 32

came up with nuclear model, discovered the nucleus, shot alpha particles at gold foil

Question 33

Thomson

Answer 33

Discovered the electron, came up with plum pudding model, cathode ray tube

Question 34

Dalton

Answer 34

Spilt compounds into component elements, billard ball model