Vocabulary
number placed in front of an element symbol or chemical formula in an equation
What is a coefficient?
This is the name for the electrons in the outmost shell.
What are valence electrons?
Determine the number of atoms AND the number of MOLECULES: 5H2SO4
What is: 10 atoms of Hydrogen, 5 atoms of Sulfur, and 20 atoms of Oxygen, for a total of 35 atoms, and there are 5 molecules.
a substance to the left of the arrow in a chemical reaction
What is a reactant?
These are found on the Periodic Table
What is an element?
When the number of atoms is equal on both sides of the equation, we say that this LAW has been fulfilled.
What is the LAW OF CONSERVATION OF MASS?
The periodic table gives three pieces of information for each element. Name them.
What are the chemical symbol, atomic number, and atomic mass?
Count the ATOMS in: C6H12O6
(please give the number of atoms for each element, AND the TOTAL number of atoms)
What is: 6 atoms of Carbon, 12 atoms of Hydrogen, 6 atoms of Oxygen, for a total of 24 atoms?
What does the arrow mean in 4Fe + 3O2 --> 2Fe2O3
What is yields?
Define MATTER
What is anything that has mass and takes up space?
is like a ‘recipe’ telling what happens during a chemical reaction.
What is a chemical equation?
This is the procedure to find the number of neutrons.
What is subtract the atomic number from the atomic mass.
What do you call the "Letter(s)" that represent an element on the Periodic Table? (ex: Cl = Chlorine)
What is a chemical symbol? (You MUST include the word "symbol")
a number placed in front of an element symbol or chemical formula in an equation
What is a coefficient?
Two or more different elements, chemically combined
What is a compound?
chemical reactions that release thermal energy
What is exothermic?
Name the three sub-atomic particles, describe what charge each one has, and where they might be found in an atom.
(NOTE: that's actually NINE mini-responses!)
electron - negative - around the nucleus
proton - positive - in the nucleus
neutron - neutral - in the nucleus
Count the number of ATOMS and the number of MOLECULES in Iron Sulfate: Fe2(SO4)3
What is: 2 atoms of Iron (Fe), 3 atoms of Sulfur (1*3) (S), 12 atoms of Oxygen (4*3), for ONE molecule of Iron Sulfate (THERE IS NO NUMBER IN FRONT, SO IT IS ONE!)
a number to the bottom right of an element
What is a subscript?
The smallest unit of an element that retains all of the properties
What is an atom?
Explain the difference between homogeneous and heterogeneous
What is homogeneous is evenly distributed (the same all throughout), and heterogeneous is NOT evenly distributed
Explain why this equation is not balanced:
N2 + H2 -> NH3
Then, BALANCE IT.
N2 + H2 -> NH3 is not balanced because there are two atoms of Nitrogen and two atoms of Hydrogen on the left, but NH3 has ONE atom of Nitrogen and THREE atoms of Hydrogen.
the balanced equation is: N2 + 3H2 -> 2NH3
a substance to the right of the arrow in a chemical reaction
What is the product?
Explain the difference between a mixture and a compound.
What is all of the elements in a mixture keep their own properties because mixtures are physically combined, but compounds form new substances, and are chemically combined