Matter
Mixtures
Ionic Bonds
Covalent Bonds
100
Define Element
A substance that cannot be broken down into simpler substances by chemical means.
100
What is a mixture
2 or more compounds
100
Ionic Bonds are formed between _________ and ___________
metals and non-metals
cations and anions
+ and -
100
Covalent Bonds are formed between 2 _____________
non-metals
200
Define a compound
2 or more elments chemically bonded together
200
2 compounds that do not mix well are called a _______________ mixture
Heterogeneous
200
In ionic bonds the electrons swap/share (choose 1)
swap
200
Covalent Bonds form when electrons are swapped/shared? (choose 1)
shared
300
Is chopping wood is an example of a physical or chemcial change?
Physical Change (Not changing chemical makeup)
300
Na+1 and Cl-1 make?
NaCl
300
Draw the Lewis Structure for Cl2
400
I burn wood in my backyard to create fire. Is this an example of a chemical or physical change?
Chemical
400
A heterogeneous mixture is also called a ____________?
Solution
400
Solve and name the ionic bond between Mg and Br?
MgBr2
Magnesium Bromide
400
What are some properties of covalent bonds
Low melting points
Don't dissolve in H20
Non Conductive
500
Phase Changes are what kind of change
Physical!
Think Ice --> Water --> Steam (All H20)
500
In a salt water solution what is the solvent and what is the solute?
Water Solvent
NaCl Solute
500
Draw the valence electrons to represent Potassium Chloride
500
What is a bond?
a pair of electrons
can be single, double, or triple