This is an arrangement of elements in columns, based on a set of properties that repeat
What is a periodic table?
100
The rows in a periodic table are called ________.
a period
100
This is an electron that is in the highest occupied energy level.
What is a valence electron?
100
This group / family consists of 3 nonmetals and 2 metalloids.
What is the Oxygen Family?
200
This is a column in a periodic table.
What is a group?
200
These are the 4 pieces of information that each box shows.
Name of the element, its symbol, its atomic number, and its atomic mass.
200
Why do elements in a group have similar properties?
Because they have the same number of valence electrons.
200
This group / family has 4 valence electrons.
What is the Carbon Family?
300
Elements that form a bridge between metals and nonmetals
What are transition metals?
300
What are the three classifications of elements?
Metals, nonmetals, metalloids.
300
What happens to the reactivity of alkali metals as you move from the top of the group to the bottom?
The reactivity increases from the top of the group to the bottom.
300
This group consists of elements that are highly reactive NONMETALS.
What are the halogens?
400
Elements that are poor conductors of electric current and heat.
What are nonmetals?
400
What is the periodic law?
A pattern of repeating properties.
400
Differences in this group are shown by the ways they react with water.
What are the alkaline earth metals?
400
The discovery of this element showed how useful the periodic table could be.
What is gallium?
500
He found the best way to organize elements.
Who is Dmitri Mendeleev?
500
What major change occurs as you move from left to right across the periodic table?
Elements become less metallic and more nonmetallic in their properties.
500
Why was it difficult to discover the noble gases?
Because they are colorless and odorless and rarely react with other elements.
500
This scientist grouped the known elements into categories he called metals, nonmetals, gases, and earths.
Who is Antoine Lavoisier?
500
Why was the discovery / creation of the periodic table important for science?
With the creation of the periodic table, scientists / chemists could do more than predict the properties of new elements. They could explain the chemical behavior of different groups of elements.