Physical and Chemical Properties
Physical or Chemical Change:
Wood is burned
Chemical Change
A substance that is made of all the same atom type
Element
What is the atomic number equal to?
Protons
What is the charge of an electron?
negative 1
Atom with a charge
Ion
Physical or Chemical Property:
Silver has a shiny luster
Physical
Type of mixture:
A container of legos and building blocks
Heterogeneous
What is the charge of a proton?
Positive 1
How many valence electrons does Lithium have?
1
An atom with a positive charge
Cation
Physical or Chemical Change:
Liquid water is heated to steam
Physical
Pure Substance or Mixture
H2O
Pure substance
How many protons are in Sodium?
11
How many valence electrons does Sulfur have?
6
Same atom but different mass
Isotope
Physical or Chemical Change:
When potassium chloride is added to a flame. It turns the flame purple.
Chemical Change
Type of Substance? (Be specific)
Salt water
Homogeneous Mixture
How many neutrons are in an atom of Carbon with a mass of 14amu?
8
What is the electron configuration of Nitrogen?
1s22s22p3
Electrons on the outermost energy level
Valence Electrons
What makes a change considered a chemical change?
What is the difference between a pure substance and a mixture?
Pure substances are made up of all the same thing and mixtures are a physical blend of items
How do you calculate mass number?
Protons plus neutrons
What is the electron configuration of Sodium?
1s22s22p63s1
When atoms want to have 8 valence electrons/the same as a nobel gas.
Octet Rule