Terminology
What is a Chemical Reaction?
A chemical reaction is a process where a set of substances undergo a chemical change to form a different substance.
What is the pH scale?
A pH scale is used to measure how acidic or basic a liquid is.
What is a Synthesis reaction?
A synthesis reaction is one where two substances combine to make a new substance.
It can be shown in an equation such that A + B --> AB.
Why is it called the Periodic Table?
It is called "periodic" because elements are lined up in cycles or periods.
What are reactants?
A reactant is any substance that is consumed or used up during the reaction.
What is an acid?
A chemical with a lot of hydrogen ions.
What is a Decomposition Reaction?
A decomposition reaction is where a complex substance breaks down to form two separate substances.
It can be shown in an equation such that AB --> A+ B.
How many elements are there?
There are currently 118 known elements.
What are products?
Products are the substances that is produced by a chemical reaction.
What is a base?
A chemical with a lot of hydroxide ions.
What are the five basic categories of chemical reactions?
Synthesis, decomposition, combustion, single replacement, and double replacement.
What element is 'H'?
Hydrogen
What is a catalyst?
A catalyst helps to speed up the rate of reaction.
What is range of the pH scale?
0-14
What type of chemical reaction is Photosynthesis?
A photochemical reaction, because it is one involving photons from light.
what element is 'Au'?
Gold
What is an inhibitor?
An inhibitor is used to slow down the reaction.
What is the pH level of water?
7
What is a Combustion reaction?
A combustion reaction occurs when oxygen combines with another compound to form water and carbon dioxide.
Combustion reactions produce energy in the form of heat.
What is the second most common element in the universe, but is very rare on the Earth?
Helium