Just the Basics
In the mnemonic device, "King Henry Died Unexpectedly Drinking Chocolate Milk," the words in the phrase represent this list of metric prefixes.
What are kilo, hecto, deca, unit, deci, centi, and mili?
He is credited with having created the first modern periodic table.
Who is Dimitri Mendeleev?
These compounds have a crystal lattice structure.
What are ionic compounds?
This is a measure of the amount of order within a system.
What is entropy?
This law states that the total mass of reactant undergoing a chemical reaction is always equal to the total mass of the product in a chemical change.
What is the Law of Conservation of Mass, in terms of a chemical reaction.
In an experiment, this variable is the one you change.
What is the independent or manipulated variable?
Credited with creating the first atomic theory, three of his five points are still accepted as true today.
Who is John Dalton?
A bond in which two atoms share electrons.
What is a covalent bond?
The name given to the vertical divisions of the periodic table.
What are groups?
This law states that a pure chemical compound always contains the same elements combined together in the same proportion by weight whatever may be the method of its preparation or whatever may be its source.
What is the Law of Constant Proportions?
A hypothesis is an idea must be repeatable and that can be tested. Testing a hypothesis results in one of the two, following, dichotomous outcomes.
What is it is either supported or unsupported?
He envisioned atoms like small marbles.
Who is Democritus?
This bond occurs when electrons shared by two atoms are held more closely by one atom.
What is a polar covalent bond?
A substance which undergoes a change in a chemical reaction.
What is a reactant?
This law states that when gases react to give products under the same condition of temperature and pressure, they react in the simple whole number ratio by volumes.
What is The Law of Gaseous Volumes?
A description of how close a measurement is to its actual value.
What is accuracy?
In 1865, John Newlands arranged the known elements by property and by order of increasing atomic mass. He noticed that patterns repeated about every 8 elements. This was what he called this pattern.
What is the Law of Octaves?
In this type of reaction, binary compounds typically break down into two elements.
What is a decomposition reaction?
This is the energy (as heat) needed to raise 1 mole of an element or compound by 1K.
What is molar heat capacity?
This law states that if two elements combine to give two or more different chemical compounds, then the weight of one of the elements, which combine with the fixed weight of the other, always show numerical ratio to one .
What is The Law of Multiple Proportions?
The scientific notation for 123,000,000
1.23 x 108
This is derived from the average mass of an element’s isotopes weighted by the % of their abundance in nature.
What is atomic mass?
Percentage Yield is determined with this equation.
What is Actual Yield/Theoretical Yield x100?
This is the experimental measurement of enthalpy.
What is Calorimetry?
This law states that two or more elements, which combine separately with the fixed weight of another element, are either the same or the simple multiples of the weights of the elements when they combine among themselves.
What is the Law of Reciprocal Proportions?