Counting Atoms
What is four?
When iron and sulfur react chemically.
What is a compound?
A solid and a liquid interact and a gas is formed.
What is a chemical change?
Number of valence electrons of Hydrogen.
What is one?
Diamonds and graphite (both made of carbon) have different physical properties due to this.
What is they have different atomic structure?
Number of oxygen atoms in Na(SO4)2.
What is eight?
When salt is formed this has happened to the sodium and chlorine atoms.
What is the atoms have bonded?
Red liquid and yellow liquid make orange liquid.
What is a physical change?
The number of valence electrons ______________ from left to right along the periodic table.
What is increases?
The way energy is transferred in fluids.
What is convection?
There are this many molecules in C3H8.
What is one?
Carbon Dioxide is this.
What is a compound?
When new substances are formed.
What is a chemical change?
Carbon bonds with many other elements because it has this.
What are 4 valence electrons?
Balance:
Mg(OH)2 + HCl --> MgCl2 + H20
What is Mg(OH)2 + 2HCl --> MgCl2 + 2H20?
What is the conservation of mass?
Two atoms of hydrogen are bonded together.
What is a molecule?
Milk freezes
What is a physical change?
What is the number of valence electrons?
NaCl --> Na + Cl is this type of reaction.
What is decomposition?
Hydrogen + Oxygen --> Water + Energy. This happened to the mass.
What is it was conserved?
Fe + S
What is a mixture?
Phase changes
What are physical changes?
The tendency of an element to react is closely related to....
What is the number of valence electrons?
C + O2 --> CO2 is this type of reaction.
What is addition?