science test
how many groups are there on the periodic table?
18
how many periods are there
7
how many periods are there on the periodic table?
7
Group 2 on the periodic table corresponds to what family of elements?
Alkali earth metals.
The element in group 15 and period 4
Arsenic
The element in group 1 and period 7
Francium
though we know Hydrogen is a non-metal, why do you think it is placed on top of the alkali metals?
It's number of valence electrons is the same as the members of the Alkali Metal family.
The element in group 2 and period 3
Magnesium
What family of elements does arsenic (As) belong?
Metalloids.
The element in group 18 and period 6
Radon
What are 3 similar properties of alkali metals?
The alkali metals are all shiny, soft, and highly reactive.
What electron pattern do you notice for all of the elements belonging to the Alkali Metal family?
The last electron listed is 1
How many elements belong to the Halogen family? List the member elements by their symbol.
There are 5 elements belong to the Halogen family. They are F, Cl, Br, I, and At.
How many elements belong to the Alkali Metal family? List the member elements by their symbol.
There are 6 elements. They are Li, Na, K, Rb, Cs, and Fr.
What type of molecule is formed when a halogen combines with hydrogen?
acid
which group in the periodic table is the most reactive
alkali metals
what is the second group on the periodic table
alkaline earth metals
how are element in the periodic table organized?
based on physical and chemical properties.
Where are alkali metals found naturally?
group 1
What property is the periodic table organized by?
increasing atomic number
which properties most accurately describe the element mercury?
liquid at room temperature
Most of the elements in the periodic table are
metals
Are most of the elements on the periodic table classified as a metal or a non-metal?
metals, makes up 75%
which group of elements is un reactive
noble gases
The element in group 10 and period 5
palladium
each horizontal row on the periodic table is called what
period
which accurately describes nonmetals
poor conductors of electricity
Click on the word Lanthanoid, what is another common name for this group of elements?
rare earth metals
Are the non-metal elements located on the left or right side of the periodic table?
right side
groups on the periodic table are arranged
vertically
What is a common substance that alkali metals react vigorously with?
with water