Trends
Left and Down
What did Newlands discover?
He discovered the periodic pattern in elements based on their masses
What period is only made of gases?
Period 1
What group is known for not reacting with other elements
Noble gases
What is the name of the number representing the amount of protons and electrons in a neutral atom.
The Atomic Number
When moving from left to right on the periodic table why does the atomic radius/size decrease?
The larger nucleus pulls the electrons closer to the center.
What did Moseley create?
Moseley Created the periodic table we use now by ordering it with atomic number(number of protons) instead of by mass.
If you throw a group 1 element into water what happens
It Explodes
An element is found to have a complete valence shell. What group is this element in?
Noble Gases
Electrons in the outermost shell/principle energy level
What directions do Ionization Energy, Electron Affinity, and Electronegativity Increase on the periodic table?
Up and Right
What property did Mendeleev use to design the periodic table?
Atomic weight/mass
What element filled the first blimp the Hindenburg
Hydrogen
Name the most reactive groups in the periodic table.
Multiple groups can answer this! (If first group gets it wrong)
Alkali Metals
Alkaline Earth Metals
Halogens
An element has three valence electrons which element will it react most like (they react similarly)
2.B
3.C
4.N
All groups can answer by having one person hold up a number of fingers
2.Boron (B)
Why does Ionization energy decrease when moving down the periodic table?
The distance between the nucleus and the electrons is increasing.
Name an exception to Mendeleev's order of the periodic table. (What elements are not in order of mass)
Bonus points for naming more than one pair of elements correctly!
Ni and Co
Te and I
Name as many elements as you can.
Any incorrect elements loses all points
(100 points per element)
Names of elements
What group is known for being incredibly reactive and forming negative ions
Halogens (group 17)
What about the atom of an element shows its chemical properties?
Its number of valence electrons/group
What are Ionization Energy, Electron Affinity, and Electronegativity?
You need all three for the points.
IE = energy to remove an electron
EA = Energy change when adding an electron
EN = Strength of an atom pulling electrons in a bond
Why did Mendeleev place some elements in the wrong order based on mass?
He placed elements in the wrong order due to their chemical properties (Reacting similarly to elements in a different group)
Which element has the highest electronegativity
1. [He] 2s^2 2p^5
2. [He] 2s^2 2p^4
3. [Ar] 3s^2 3p^5
4. [Ar] 3s^2 3p^4
All groups can answer by one person holding up their fingers!
1. [He] 2s^2 2p^5
Name as many group names as you can!
The group that gets the most wins. (Name all of them and get double points)
Alkali
Alkaline Earth
Inner transition
Lanthanoids
Actinoids
Transition
Post Transition
Metalloids
Reactive Nonmetals
Halogens
Noble Gases
An element is found to have a full valence shell. What does this say about how reactive the element is?
It will not be reactive