Organization
Trends 1
Trends 2
Bohr
Lewis
100
Atoms go in order on the periodic table by their....
Atomic # (or number of Protons)
100
List two properties of Chromium (atomic # 24).
Two of the following are correct: shiny, highly conductive, malleable, highly reactive
100
All atoms in the same period have the same number of....
energy levels
100
To draw a Bohr model do you look at the Period # of the Group #?
Period #
100
To draw a Lewis Dot structure for an atom do you look at the Period # or the Group #?
Group #
200
Metals can be found on the ____ side of the periodic table.
Left side
200
Why can't we predict the properties of Boron?
Because it is a metalloid (they have properties of both metals and nonmetals)
200
All atoms in the same column have the same number of....
valence electrons
200
What are energy levels?
The "rings/shells/orbits" around the nucleus of an atom where electrons are found.
200
Draw the Lewis Dot Structure for Phosphorous
Make sure you have 2 e- on one side, and 3 single e- on the other sides!
300
On the periodic table, mettaloids are found where?
In between metals and nonmetals (or along the "staircase".
300
List two properties of Phosphorus (atomic # 15).
Two of the following are correct: dull, poor conductor, brittle, not very reactive
300
What is the MOST reactive metal on the periodic table and the LEAST reactive?
Most = Francium
Least = Aluminum
300
What are valence electrons?
Electrons on the outermost energy level.
300
How many valence electrons do Group 17 elements have?
7 valence electrons
400
What is the name of the Group 18 elements?
Noble Gases
400
Why does the size of the atom increase as you go down columns?
Because the number of energy levels increases.
400
Why does reactivity increase as you go down columns?
Atomic size increases as you go down columns, thus electrons are further and further away from the nucleus. This means the nucleus has a harder time "holding electrons in." Valence electrons can get "taken" by other elements very easily.
400
Draw the Bohr model of Oxygen, include the # of protons and neutrons in the nucleus.
400
Draw the Bohr model of Magnesium to prove why it is in Group 2.
Valence e- are circled. There are 2 valence e-, thus Magnesium is in Group 2.
500
These types of metals make up the majority of the metals on the periodic table.
Transition Metals
500
All elements like to have a full outer shell with 8 valence electrons, except for this element.
Helium
500
Why does reactivity decrease as you go across rows?
As you go across a row the atomic # increases. This means the number of protons increases as well. With more protons in the center, the electrons are more attracted to the nucleus, and get "pulled in." This makes it harder for other atoms to "take" away its valence electrons.
500
How many electrons does it take to fill the second energy level of atoms?
8 electrons
500
What's the point of drawing Lewis Dot Structures?
They show the only e- that are involved in chemical reactions.