This is what the state symbols (s), (l), (g), and (aq) represent in chemical equations
What are solid, liquid, gas, and aqueous
100
This is the law of conservation of matter
What is matter cannot be destroyed nor created in a chemical reaction
100
These are the 5 types of chemical equations we've discussed in class
What are decomposition, syntheis (addition), single replacment, double replacement, combustion
100
This is the definition of radioactivity
What is the tendency of some elements such as uranium to emit radiation as a result of changes in the atomic nucleus
100
This is the definition for half-life
What is the time required for half the atoms in a sample if a radioactive isotope to decay
200
This is the subscript and coefficient for hydrogen in the unbalanced equation below
H2 + O2 ----------> H2O
What is the subscript is 2 and the coefficient is one
200
This is why a subscript cannot be changed in a chemical reaction
What is the identity of the compound is changed
200
This is the type of reaction that was included in the relative reactivites of metals lab
What is single replacement
200
These are the three types of radiation discussed in class
What are alpha, beta and gamma radiation
200
This is how long it would take half of a sample of carbon -14 to decay if it's half-life were 5730 years
What is 5730 years
300
These are the seven diatomic elements
What are Hydrogen Oxygen, Fluorine, Bromine, Iodine, Nitrogen, Chlorine
300
This is what balancing equations has in common with the law of conservation of matter
What is equations are balanced so they agree with the law of conservation of matter. Atoms cannot be lost or gained in reactants or products.
300
This is the reaction type for the chemical equation below
NaOH + HCl ----------> NaCl + H2O
What is a double replacement reaction
300
This is the equation for the alpha decay of uranium - 238
What is (see board)
300
This is the definition of nuclear fission and the definition of nuclear fusion
What is the splitting of an atom and the joining of two atomic nuclei. Both reactions release much energy
400
This is the chemical equation below written in terms of the word molecules
2H2 + O2 -------------> 2H2O
What is
Two molecules of hydrogen and one molecule of oxygen react to form two molecules of water
400
This is the equation below in balanced form:
C2H6 + O2 --------> CO2 + H2O
What is
2C2H6 + 7O2 -----------> 4CO2 + 6H2O
400
This are the products of the combustion reactions we've discussed
What are carbon dioxide and water
400
This is equation for the beta decay of carbon-14
What is (see board)
400
This is one way knowledge of radioactivity is used in the art world
What is to date artifacts
500
This is The following word reaction written as an equation (include the states)
chlorine gas reacts with sodium metal to form solid sodium chloride
What is Cl2 (g) + Na (s) -------------> NaCl (s)
500
This is a visual representation of the balanced equation below
CH4 + 2O2 ----------> CO2 + 2H2O
(make sure the atoms of the same element look the same on the reactant and product side of your visual)
What is
(see board)
500
This is what happens in a single replacement reaction
What is the more reactive element replaces the less reactive element in a compound
500
According to your book, all nuclei having more than this many protons are radioactive
What is 83 protons
500
This would be the age of a wooden artifact if the carbon-14 found in it was only a quarter of what was originally in the wood used.