Vocabulary
Atoms
Mostly Counting
Chemical Equations
Element, Compound Atom?
100

number placed in front of an element symbol or chemical formula in an equation

What is a coefficient?

100

This is the name for the electrons in the outmost shell.

What are valence electrons?

100

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.

100

a substance to the left of the arrow in a chemical reaction

What is a reactant?

100

These are found on the Periodic Table

What is an element?

200

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?

200

The periodic table gives three pieces of information for each element.  Name them.

What are the chemical symbol, atomic number, and atomic mass?

200

Count the ATOMS in: C6H12O

(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?

200

What does the arrow mean in 4Fe + 3O2 --> 2Fe2O3

What is yields?

200

Define MATTER

What is anything that has mass and takes up space?

300

is like a ‘recipe’ telling what happens during a chemical reaction.

What is a chemical equation?

300

This is the procedure to find the number of neutrons.

What is subtract the atomic number from the atomic mass.

300

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")

300

a number placed in front of an element symbol or chemical formula in an equation

What is a coefficient?

300

Two or more different elements, chemically combined

What is a compound?

400

chemical reactions that release thermal energy

What is exothermic?

400

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

400

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!)

400

a number to the bottom right of an element

What is a subscript?

400

The smallest unit of an element that retains all of the properties

What is an atom?

500

Explain the difference between homogeneous and heterogeneous 

What is homogeneous is evenly distributed (the same all throughout), and heterogeneous is NOT evenly distributed

500

Explain why this equation is not balanced: 

N2 + H2 -> NH3

Then, BALANCE IT.

N2 + H2 -> NHis 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

500

a substance to the right of the arrow in a chemical reaction

What is the product?

500

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

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