Periodic Table
Periodic Trends
Periodic Table 2
Element Categories
Periodic Table 3
Atoms
100
The modern periodic table organizes elements according to this.
What is increasing atomic number?
100
Group/family numbers can be an indication of this.
What is number of valence electrons?
100
Metals form this type of ion.
What are cations (+ ions). They GIVE valence electrons.
100
The very reactive elements in group 1 are known as this.
What are alkali metals?
100
The horizontal rows on the periodic table.
What are periods?
100
What does the Atomic number mean?
The number of Protons, which also equals the number of electrons for a neutral atom.
200
The three classes (main categories) of elements.
What are metals, nonmetals and nonmetals?
200
The period numbers indicate this.
What is number of energy levels?
200
Elements that have characteristics of both metals and nonmetals.
What are metalloids (semiconductors)?
200
Silicon, Boron, and Tellurium are examples of this class of elements.
What are metalloids?
200
Reason Noble gases are stable.
What is a full outer energy level?
200
What does the mass number mean?
The number of Protons + Neutrons. (so how much the atom weighs in total).
300
Being shiny, malleable, and conductors are properties of this class of elements.
What are metals?
300
Electrons that can most easily be lost, gained, and shared.
What are valence electrons?
300
The reactive elements in group 2 are known as this.
What are alkali earth metals?
300
This class of elements are good conductors of heat and electric current.
What are metals?
300
Elements in the same group share these characteristics.
What are chemical and physical properties, number of valence electrons?
300
Which part of an atom has virtually no mass and determines how the atom behaves?
Electrons
400
This class of elements are poor conductors of heat and electricity.
What are nonmetals?
400
What trend increases as you move from the middle of the periodic table to EITHER the left side or the right side in a period?
How reactive the elements are! Period 1 and Period 7 are VERY reactive!
Also, atomic size! Remember, metals make themselves bigger to lose their electrons easier. Nonmetals have more protons, neutrons, and electrons as you move to the right... so they have to get bigger.
400
The elements in group 17 (7a) are known as this.
What are the halogens?
400
Nonmetals form this type of ion.
What are anions? (- ions). They want to GAIN electrons.
400
The vertical columns on the periodic table.
What are groups or families?
400
How many Neutrons are in a Uranium atom? 
238-92=146 neutrons
500
This class of elements have properties of both metals and nonmetals.
What are metalloids?
500
What trend increases as you move right AND up on the periodic table? (hint: it means greediness)
The Electronegativity of the Elements
500
The nonreactive elements in group 18 (8a) are known as this.
What are the noble gases?
500
Being brittle, dull, and insulators are properties of this class of elements.
What are nonmetals?
500
Number of periods on the periodic table.
What is 7?
500
How many Electrons are there in a Uranium Atom?
92
600
A new element is found with an atomic number of 119. Where would you place it on the periodic table and what would it be called?
It should be in period 8 and group 1. So it should act like an alkali metal (be explosive in water and VERY reactive).