p and c
What is an example physical Change?
include changes in the size or shape of matter
Can we walk around with labatory glassware?
No, it it very dangerous
What is density?
The density of a substance is its mass per unit volume.
Metals are opaque, lustrous elements that are good conductors of heat and electricity.
What is element?
any of four susbstance air, water , fire, and earth formerly believed to compose the physical universe
Name at least 2 of four example of physical changes?
examples are boiling, melting,freezing and shredding
Are we able to eat and drink in the lab ?
No, for safety reasons
What is the all important equation for density?
density= mass divided by volume
what is Na?
Sodium
how many elements are in a periodic table?
there are 118 elements
Is water a boiling water a chemical change?
boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid(such as H20-> H2 and 02) , then boiling would be a chemical change.
can you answer you cellphone while on a lab ?
No , we are suppose to protect our area and ourselves from any exposures to different substances
what is the unit of density?
Kilogram per cubic meter
what is Rb?
Rubidium
what are 7 elements of earth
1. Nature 2. water 3. fire 4. Earth 5.Light 6. Darkness 7. and spirit
Is buring wood a chemical property?
yes it becomes ash
can you enter the lab room with out googles?
No for our safety to chemical exposure
what does density indicate?
it indicates how much of a substance occupies a specific volume at a defined temperature and pressure.
What is Li?
Lithium
what is the atomic number on oxygen?
8
Is cutting a lemon a physical change ?
yes the lemons are slices of lemons same substance
If a material is spilled do you have to let a teacher know?
Of course for the safety of your self and others around you
what s density of water in g ml?
roughly 1 gram per milliliter
What are the 6 alkali metals ?
Lithium,sodium,potassium,rubidium,cesium,francium
What are the 4 major atomic elements ?
oxygen, carbon,hydrogen, and nitrogen