Pure Substances & Mixtures
Salt water is an example of a...
Solution!
The most stable family on the periodic table are the...
Noble Gases!
The atomic number gives you what two pieces of information?
The # of protons and electrons!
What is a ionic compound composed of?
Ionic: metal & non-metal
Trail mix is an example of a...
Mechanical mixture!
Elements in the same period have the same number of...
Electron shells!
How do you find the number of neutrons?
Mass # - Atomic #
Steps to write the chemical formula for ionic compounds...
1. Identify the metal & non-metal
2. Determine their charges
3. Balance their charges to form a neutral compound (criss cross method)
4. Write out your final formula!
Brass & steel are examples of...
Alloys!
Elements in the same family have the same number of...
Valence Electrons!
How many electrons fit in the first, second, and third shells?
2 in the first, 8 in the second and 8 in the third!
What's the chemical name for Ca3N2
Calcium Nitride
Pure Substances and elements are...
Compounds!
The group of elements that often react with the alkali medals...
Halogens!
What element has zero neutrons?
Hydrogen!
What is the chemical formula for: Lithium Iodide
LiI