Formulas
Periodic Table
Vocabulary
Compounds
Elements
100
What is the fomula for water?
H2O
100
What is the atomic number for nickel?
28
100
What is an atom?
very small particles that make up the elements
100
CaCO3 What element is Ca and how many are there in this compound?
Calcium and 1
100
What is the element with He as the symbol?
Helium
200
What is the formula for Hydrochloric acid?
HCl
200
What is the symbol for Helium?
He
200
What is an element?
a pure material that is made up of one kind of atom
200
NH3 What is the H for in this compound and how many are there?
Hydrogen and 3
200
What is the element with Ag as the symbol?
Silver
300
What is the formula for ammonia?
NH3
300
What is the atomic weight for hydrogen?
1.00794
300
What is a molecule?
a particle that is made up of more than one atom
300
P2O5 What element is the O and how many are there?
Oxygen and 5
300
Which element has the smallest atomic number?
Hydrogen
400
What is the formula for Carbon Dioxide?
CO2
400
What is the symbol for magnesium?
Mg
400
What is a compound?
more than one type of atom put together
400
HCl What are the elements in this compound?
hydrogen and chlorine
400
What class is krypton in?
noble gas
500
What is the formula for Phosphorus Pentoxide?
P2O5
500
What element has an atomic number of 10?
neon
500
If it is a compound what else would it be?
a molecule
500
CO2 What are the elements in this compound?
Carbon and Oxygen
500
What class is tin in?
metal
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