Drawing the Atom
While not the most modern theory, this model allows us to draw atoms, showing electrons on the outside
What is a Bohr model?
Neutrons = 16
If a piece of matter is made up of only one type of atom, it is called this.
What is an element?
Define chemical change.
Chemical change is the structure itself changing into something new, and cannot be reversed.
These are outer shell electrons.
What are valence electrons?
Salt (NaCl) is an example of this type of matter.
What is a pure substance?
Gasoline is flammable
What is a chemical property?
Three subatomic particles and their charges.
What are protons (+), neutrons (no charge) , and electrons (-)?
How many electrons can fit on each orbital surrounding the nucleus?
First orbital = 2e, then 8e on each
This is what an ion is called when it has a positive charge
What is cation?
Heterogenous is not mixed evenly throughout, while homogenous is
The cookies smell like chocolate.
What is a physical property?
Draw a bohr model for Sulfur on the board. And write its valence electrons.
On board
Find the number of protons, neutrons and electrons for 208O-1
P=20 N= 12 e=21
What is a homogenous mixture?
Ice cream melting is an example of this
What is a physical change?
The region of space around the nucleus where an electron is likely to be found.
What is an orbital?
Draw a bohr model for 5224Cr-2 on the board and write its valence electrons.
On board
Find the number of protons, neutrons and electrons for 23592U+3
P= 92 N=143 e= 89
What is easier to separate, mixtures or compounds and why?
Mixtures because they aren't chemically bonded together and can be removed easier
Name three signs that a chemical changes has occurred
Color change, smell produced, temperature change, bubbles forming, solid forms, etc.
This is what the new, modern model of the atom called
What is the electron cloud model?