Chemical and Physical
What is a chemical change?
substances combine to form new substances
What are 3 subatomic particles found in an atom?
proton, neutron, electron
MgCl2
magnesium chloride
define an Ion
Charged atom
Define a covalent bond
two atoms sharing an electron
Give and example of 3 physical changes
many
Which particles contribute the charge of the atom?
Proton and neutron
CuO
what is an ionic bond?
The bond between a positively charged Ion and a negatively charged Ion. Usually a metal and a non metal.
What is the difference between a molecule and a compound?
Molecules are bonded covalently with sharing electrons, a compound is a combination of 2 or more atoms with varying bonds.
what are 3 signs of a chemical change?
O G E C P
What is the name of P2F6?
Diphosphorus Hexaflouride
What is the name for an elements that gives electrons, receive electrons?
Cation, Anion
Give an example of a covalently bonded molecule
water, carbon dioxide
What is the major difference between a physical and chemical change?
one can be reversed and one not.
How many electrons are in each of the first 4 shells
2,8,8,18
What is the formula for Calcium and Nitrogen?
Ca3N2
What happens to electrons in Ionic bonds?
They are given from the cation to the anion
Very low melting points, does not conduct electricity, soft, soluable
What are some common chemical properties of metals?
reactivity
corrosion
electropositivity
How do subatomic particles determine the chemical behavior of an atom?
up for debate. Mr. Lorenz's call
What is the name of PbS2?
Lead (|V) sulfide
What are 2 of the properties of Ionic compounds?
Conduct electricity, Very high melting points, lattice structure, solid
How many total bonds are there in Carbon Dioxide?
4