Question 1

happens AFTER your Question ; proposed answer for experiment

Accepted Answer

hypothesis

Question 2

definite volume + indefinite shape

Accepted Answer

liquid

Question 3

mixture that looks "different" throughout

Accepted Answer

heterogeneous

Question 4

variable also known as the manipulated; plotted on x-axis

Accepted Answer

independent

Question 5

having 4 atoms , like P

Accepted Answer

tetratomic

Question 6

means having 2 atoms , like Br

Accepted Answer

diatomic

Question 7

starting material in a chemical reaction

Accepted Answer

reactants

Question 8

radiation blocked by wood

Accepted Answer

beta particles

Question 9

SI unit for mass

Accepted Answer

kg

Question 10

SI unit for temperature

Accepted Answer

Kelvin

Question 11

SI unit for length

Accepted Answer

m

Question 12

products and reactants form at same rate

Accepted Answer

equilibrium

Question 13

Group 8A elements

Accepted Answer

Noble Gases

Question 14

Group 7A elements

Accepted Answer

Halogens

Question 15

identifies element ; number of protons

Accepted Answer

atomic number

Question 16

radiation blocked by paper

Accepted Answer

alpha particles

Question 17

space taken up by object

Accepted Answer

volume

Question 18

find this by subtracting atomic number from atomic mass

Accepted Answer

neutrons

Question 19

lots of energy created by combining several light radioactive nuclei

Accepted Answer

nuclear fusion

Question 20

ions with - charge and gains valence electrons

Accepted Answer

anion

Question 21

ions with + charge and loses valence electrons

Accepted Answer

cation

Question 22

arrangement of elements on current periodic table

Accepted Answer

increasing atomic number

Question 23

chemical bond made by sharing electrons between 2 anions

Accepted Answer

covalent bond

Question 24

always conserved in every chemical reaction

Accepted Answer

molar mass & number of atoms

Question 25

chemical bond made by transferring electrons from cation to anion

Accepted Answer

ionic bond

Question 26

range from 0 to 6 on pH scale

Accepted Answer

acids

Question 27

range from 8 to 14 on pH scale

Accepted Answer

bases

Question 28

time it takes radioactive material to decay 50%

Accepted Answer

half-life

Question 29

solution holding more than max amount of solute

Accepted Answer

super saturated

Question 30

solution holding less than the max amount of solute

Accepted Answer

unsaturated

Question 31

conserved in every chemical reaction

Accepted Answer

# of atoms / molar mass

Question 32

getting the same result repeatedly

Accepted Answer

precise

Question 33

getting close to the expected value

Accepted Answer

accurate

Question 34

elements that have properties of both metals and nonmetals

Accepted Answer

metalloids

Question 35

leads to the same composition

Accepted Answer

physical change

Question 36

leads to a new composition

Accepted Answer

chemical change

Question 37

part of solution that gets mixed in

Accepted Answer

Solute

Question 38

part of solution that does the mixing

Accepted Answer

Solvent

Question 39

isotope used for Carbon dating of fossils

Accepted Answer

C--14

Question 40

shows valence electrons only

Accepted Answer

Lewis Dot Structure

Question 41

radiation partially blocked by lead and concrete

Accepted Answer

gamma rays

Question 42

last thing done after lab is finished

Accepted Answer

clean up and wash hands

Question 43

group not receiving the independent variable

Accepted Answer

control

Question 44

amount of matter an object has

Accepted Answer

mass

Question 45

change in the number of neutrons

Accepted Answer

isotope

Question 46

change in the number of electrons

Accepted Answer

ion

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