A
These elements reside in Group 18 and are the most stable in the entire periodic table.
What are the Noble Gases?
This is the simplest form of matter that has a unique set of properties.
What is an element?
This is an organization system for all elements.
What is the periodic table?
These are the columns of the periodic table. There are 18 of these on the whole periodic table.
What are groups or families?
These electrons can be found in the outermost energy level of an element. They are responsible for the element's reactivity.
What are valence electrons?
This subatomic particle has a negative charge, exists outside the nucleus, and is usually not considered part of an atom's mass.
What is an electron?
These are the most reactive metals. They are found in Group 1 of the periodic table.
What are the Alkali Metals?
These are rows that go from left to right. There are 7 of these on the periodic table.
What are periods?
These elements are found in Group 17 of the periodic table. The term means “salt-former.”
What are Halogens?
This subatomic particle has no charge, is located inside the nucleus, and has a mass of 1 amu.
What is a neutron?
Properties of these include: shiny appearance, good conductors of heat and electricity, being malleable, ductile, etc.
What are metals?
If an element is in Period 1, we know it has 1 energy level around it. How many electrons must be in that first energy level to be considered "happy" or stable?
2
These elements are found in Group 2 of the periodic table. They are very reactive and not typically found alone in nature.
What are the Alkali Earth Metals?
The Atomic Number of an element is the same as the number of _______________ and electrons.
What are protons?
Elements in Group 5 of the period table have this many valence electrons.
What is 5?
This subatomic particle has a positive charge, is located inside the nucleus, and has a mass of 1 amu. This subatomic particle gives each element its identity.
What is a proton?
As you go down the periods of the periodic table, the number of these increase.
What are energy levels?
If a carbon atom has a mass number of 12 and an atomic number of 6, how many neutrons does it have?
6
These elements are found in Groups 3 - 12 on the periodic table. They contain the only three elements that produce a magnetic field: Iron, Cobalt and Nickel.
What are the Transition Metals?
An atom has 3 energy levels surrounding it. How many electrons must be in the 3rd (outermost) energy level for the element to be considered "happy" or stable?
8
This element is located in Group 1, Period 7 of the periodic table and is the most reactive (unstable) element.
What is francium?
This element is located in Group 18, Period 1 of the periodic table. It is the least reactive (most stable) element.
What is helium?
As you go from top to bottom, elements on the periodic table become more or less reactive?
As you move from left to right on the periodic table, the elements become more or less reactive?
less reactive (more stable)
These elements create a “staircase” down the right side of the periodic table. They have properties of both metals and non-metals. Some carry an electrical current if they conditions are right.
What are Metalloids?
Find Hydrogen (H) and Sodium (Na) on your periodic table. Based on their location, which element is more reactive (less stable)? How do you know?
Sodium is more reactive (less stable) because it is located further down the periodic table. (The higher the Period number, the more reactive an element is.)
What is Group number?
This Russian chemist is responsible for organizing the current periodic table.
Who is Dimitri Mendeleev?
What are groups or families?
How do we determine the number of neutrons are in an element?