Show:
I got this
pure?
chemical or physical
What am I made of
other stuff
100
in a bohr diagram you will see
What is all the shells with electrons of the atom plus the number of protons and neutrons and all their charges
100
requires dissolving one substance in another
What is a solution
100
When you make Koolaid
What is a physical change
100
water
What is 2 hydrogen 1 oxygen
100
What is the melting point of water
What is 0 degrees Celsius
200
the direction that heat move
What is from hot to cold?
200
a mixture is evenly mixed sugan and water
What is homogenous mixture
200
when you mix vinegar and baking soda
What is chemical change
200
the ingredients hydrogen peroxide is 2 hydrogens and 2 oxygens... what do the molecules look like? draw an label
What is 0-o-o-0 oxy hyd hyd oxy
200
2 hydrogen one sulfur 4 oxygen what is the chemical formula
What is H2SO4
300
In a Lewis structure, you note
What is the Chemical symbol and the electrons in the valance shell
300
a chemical substance that has constant composition all the way through
What is a pure substance
300
when you mix baking soda and vinegar temp change proves it is an endothermic or exothermic change. I know this because the temp __________
What is endothermic goes down
300
Propane has 3 carbon atoms and 8 hydrogen atoms what is the chemical formula
What is C3H8
300
made up of two or more elements chemically bonded together
What is a compound
400
when water freezes it is a _____________ reaction
What is exothermic change
400
In lemonade, lemon juice is the ______________ and water is the ________________
What is the solute / the solvent
400
when a bond is broken energy is __________
What is given off
400
draw an ammonia molecule which has 1 nitrogen and 3 hydrogen atoms........label
What is 0 Nitrogen /|\ o o o oxygen
400
made up of one kind of atom
What is an element
500
the point at which an object changes from a liquid to a gas
What is the boiling point
500
A combination of 2 or more substances but all substances remain separate from each other
What is a mixture
500
In an exothermic change heat is ____________
What is given off
500
Methane has 4 hydrogens and 1 carbon atoms draw and label
What is o hydrogen | carbon 0--o / \ o o
500
How do I know that a chemical change has occured
What is an odor is produced bubbles or smoke temp change change in color solid is formed