Chemistry/periodic table

Question 1

3 states of matter

Answer 1

solid,liquid,gas

Question 2

explain particles in a solid

Answer 2

close together, The particles vibrate back and forth but remain in their fixed positions

Question 3

explain particles in a liquid

Answer 3

close together but further apart than a solid. They are always moving.

Question 4

explain particles in gasses

Answer 4

far apart, more in all directions

Question 5

explain what physical change is

Answer 5

physical change can be easily reversed

Question 6

explain what chemical change is

Answer 6

chemical change cannit be reversed

Question 7

all particles are made of tiny matter called…

Answer 7

atoms

Question 8

atoms cannot…

Answer 8

cannot be created or destroyed

Question 9

describe what a compound is

Answer 9

an atom of an element are joined to fixed number of atoms of other elements

Question 10

during chemical reactions what do atoms do?

Answer 10

atoms rearrange to make new substances

Question 11

when chemical reaction occurs what 4 things can you see

Answer 11

color change, fizzing, light being produced, and thermal change

Question 12

hypothesis definition

Answer 12

an estimatemate made for something that may happen in an experiment

Question 13

prediction

Answer 13

what someone may think will happen

Question 14

in the periodic table vertical rows are called. .. and horizontal rows are called …

Answer 14

1.) groups 2.)periods

Question 15

definition of trend

Answer 15

a trend is a pettern of changes which shows an increase or a decrease

Question 16

Characteristics of metals

Answer 16

high melting points, strong flexible and malleable, good conductiors of heat, shiny

Question 17

caracterisics of non metals

Answer 17

low melting points, brittle, dull, poor conductors of heat

Question 18

number systems for acid, nuetral, alkali

Answer 18

1-6 (acids) 7 (N) 8-14 (acid)

Question 19

defintion of reactivity

Answer 19

the reaction become faster and more violent