H
hydrogen
helium
He
K
element
beaker
columns on the PT are called
groups/families
Step 1
ask a question
What is group 8A (18) called?
noble gases
Ne
neon
aluminum
Al
O2
element
test tube
rows on the PT are called
periods
step 2
background research
What are the elements in the middle of the PT called?
transition metals
Na
sodium
Cl
MgCl2
graduated cylinder
Metals are on the ____________ side of the PT and nonmetals are on the _____________.
left, right
step 3
hypothesis
What is the name of group 1A?
alkali metals
K
potassium
gold
Au
CO
compound
erlenmeyer flask
How many groups are there on the PT? How many periods?
18, 7
step 4
experiment
What is the name of group 7A (17)?
halogens
Pb
lead
iron
Fe
KNO3
compound
well plate
What separates the metals from the nonmetals on the PT?
staircase
step 5
analyze data and draw conclusions
What are the elements called that have properties of metals and nonmetals?
metalloids
Hg
mercury
tungsten
W
Ca3(PO4)2
compound
mortar and pestle
What do the period numbers tell us about an atom?
number of energy levels
step 6
communicate results
What is the name of group 2A?
alkaline earth metals