Atomic Theory
Bohr Models
Valence Electrons
Periods/Groups
Periodic Table Trends
100
The number of protons and electrons
What is the atomic number?
100
2n2
What rule do you use when determining the number of electrons in each shell/level?
100
electrons on outer energy level
What are valence electrons?
100
Columns of periodic table
What are groups?
100
Number of protons and electrons
What does atomic number tell you?
200
Rounded mass number - atomic number
How do you find the number of neutrons in an atom?
200
Number of protons and neutrons
What information goes in the nucleus when creating a Bohr model?
200
Outermost ring around an element's nucleus.
What is a valence shell?
200
Periods of the Periodic Table
What are the rows of the periodic table called?
200
Groups have similar properties (ie Noble gases, group 18)
What do elements in groups have in common?
300
Same elements that have different numbers of neutrons.
What is an isotope?
300
8 (for atomic numbers 1-20)
18 after Calcium
How many electrons are in the 3rd shell (or level) of an atom?
300
How many valence electrons are in Barium?
2
300
The number of valence electrons
What does the group number tell you (NOT counting transition elements)
300
Metals, non-metals, and metalloids. Based on location in the periodic table.
What are the 3 types of elements?
400
Average of the mass and abundance of each element's isotope.
Why are the mass numbers of the elements a decimal?
400
What is wrong with this Bohr model?
only 1 electron on first ring
400
How many valence electrons are in iodine?
7
400
Number of shells
What does the period of the periodic table tell you?
400
Number of shells in an element.
What is the period of the periodic table?
500
neutral (zero)
What is the charge of each element in the periodic table?
500
What is wrong with this Bohr model?
more than 8 electrons on outer ring
500
Why are valence electrons so important?
they participate in chemical reactions
500
Noble Gases.
What is Group 16 commonly called?
500
Number of valence electrons in an element.
What is the group number (minus transition elements)?