Periodic Table
What is a the chemical symbol for sodium?
Na
Name the following compound: LiF.
Lithium Fluoride
Positive, 1, nucleus
What are two ways to tell that a chemical reaction has occurred?
Change in colour, gas is formed, precipitate is formed, temperature change, light
What happens to a reaction when the temperature increases?
Kinetic energy increases and rate of reaction increases.
Which group of elements is known as the noble gases?
Group 8 (or 18 in senior)
Write the chemical formula for calcium chloride.
CaCl(2)
How many electrons does a neutral (regular) atom of oxygen have.
8
What type of reaction occurs when a compound breaks down into simpler substances?
Decomposition
How does increasing the concentration of reactants affect the rate of reaction?
Increases the number of collisions as there are more particles in the same area which will increase the chance of collisions and therefore reaction rate.
Identify the information listed for the element beryllium:
a) symbol
b) atomic number
c) number of protons
d) number of electrons
a) Be b) 4 c) 4 d) 4
Write the chemical formula of aluminum oxide.
Al(2)O(3)
What does is mean "An Ion is a charged particle"?
A charge particle is an atom that has lost or gained electrons so the number of electrons is not equal to the number of protons.
What type of reaction is this? copper + silver nitrate ----> silver + copper nitrate
Single displacement reaction
Why does increasing the surface area of a solid reactant increase the rate of reaction?
It increases the area available for collisions between particles.
What is the term for the horizontal rows on the periodic table?
Periods
Name the following compound: NaBr
Sodium bromide
What type of chemical reaction is this? Water ----> hydrogen + oxygen
Decomposition reaction
What is the effect of a catalyst on the activation energy of a reaction?
Lowers the activation energy meaning the reaction do not required the same amount of energy to work, which increases reaction rate.
What does the group number tell you about the elements in that group?
Number of valance electrons.
Write the chemical formula of potassium sulfide.
K(2)S
How many of each atom is needed for form the ionic compound Lithium Oxide.
Lithium: 2 atom
Oxygen: 1 atom
Name three ways to measure the rate of a reaction.
Collect gas in syringe or using liquid displacement (cylinder measurements), time how long something takes to dissolve, or to form a solid, or to rise to a certain mark, and measure the mass of a reaction over time.
Why does increasing the pressure of a gas increase the rate of reaction?
It forces gas particles closer together, increasing the frequency of collisions.