Term
| what are the si units for the following: volume,mass,length,height |
|
Definition
volume-liter
mass-kilogram
length-meter
height-? |
|
|
Term
| List the scientific method in order |
|
Definition
| problem, material, hypothesis,procedure,observations.data,conclusion |
|
|
Term
| what is the formula for density? |
|
Definition
|
|
Term
state whether the following phase changes, absorbs, or releases heat?
1.soild to liquid
2.liquid to gas
3.gas to liquid |
|
Definition
1.releases
2.changes
3.absorbs
3. |
|
|
Term
Give an example of each:
charles law
boyles law |
|
Definition
charles's law-hot air ballon being inflated
boyles law- the inside a biycle pump being pumped |
|
|
Term
| 2 types of pure substances |
|
Definition
|
|
Term
| give an example of a element |
|
Definition
|
|
Term
| give an example of a compund |
|
Definition
| chalk, hydrogen peroxide, H2O |
|
|
Term
| give an example of a heterogenous mixture |
|
Definition
|
|
Term
| give an exapmle of homogenous example |
|
Definition
|
|
Term
| give an example of a colliod |
|
Definition
|
|
Term
| give an example of the law of conservation of mass |
|
Definition
| when a log burns to ashes |
|
|
Term
| examplin how to seperatre a mixture of sand,salt,rocks,and metals |
|
Definition
magnet to get out metal
filter out he rocks, and heat water to evaporate the sand and salt |
|
|
Term
| the atomic number of an atom is always equal to ____________ |
|
Definition
|
|
Term
| in a bohr model how many electrons are in the 1st 2nd and 3rd shell? |
|
Definition
|
|
Term
| who is given credit for the arragment of the periodic table? how is it arraged? |
|
Definition
| Demetri Mendeleev; by increasing atomic # |
|
|
Term
| what do elements in the same periods have in common? |
|
Definition
| increasing by one proton and electron when moving to left to right |
|
|
Term
| what do elements in the same group have in common? |
|
Definition
|
|
Term
| what makes an atom stable? |
|
Definition
| when i level its outer energy level is full |
|
|
Term
name the following:
MgCl2
K2O
Sr3N2 |
|
Definition
MgCl2- Magneisum Chloride
K2O-Potassiumoxide
Sr3N2- stronium nitrade |
|
|
Term
write formulas for the following ionic compunds:
potassium nitride
calcium iodide |
|
Definition
potassium nitide- KNO3
calcium idodide- CaI2 |
|
|
Term
| List propeties of metals and non metal |
|
Definition
metals- good conductors of heat,reflect light,malleable
non metal- gases, powdery, brittle, not shiny |
|
|
Term
| what element is know as the basis of life? |
|
Definition
|
|
Term
| how does tempertaure effect the rate of dissolving in a solution? |
|
Definition
| increasing temperature speeds up dissolving |
|
|
Term
| why cant you change the subscrpits in a chemical equation? |
|
Definition
| because compunds have specific formulas |
|
|
