Introduction to Chemistry
Basic Concepts of Matter
The Structure of the Atom
Introduction to the Periodic Table
More Questions on the Periodic Table
100
An educated guess or a possible explanation of a problem.
What is a hypothesis?
100
The physical states of matter.
What is solid, liquids, and gas?
100
The mass number is made up of this.
What is the sum of protons and neutrons in the nucleus.
100
This bond occurs when the electronegativity difference is > 1.7
What is an ionic bond?
100
This family is in group ll of the periodic table.
What is the alkaline earth metals?
200
Carbon differentiates these two branches of Chemistry.
What is organic and inorganic?
200
The Law of Conservation of Mass states this.
What is mass cannot be created nor destroyed?
200
The halogens contain this number of valence electrons.
What is 7?
200
The inventor of the periodic table.
Who is Dmitri Mendeleev?
200
As one moves from left to right across the periodic table, the atomic radius of the elements tends to do this.

What is decrease?
300
The fifth step of the scientific method.
What is forming a conclusion?
300
Two ways to change the physical states of matter.
What is temperature and pressure?
300
This ion has more electrons than protons.
What is an anion?
300
What is the name of the chemical compound SiO2?
What is Silicon Dioxide?
300
The charge of nonmetals.
What is negative?
400
The branch of chemistry that studies digestion in animals.
What is biochemistry?
400
Energy possessed by a substance by virtue of it's motion has this.
What is kinetic energy?
400
Elements with one valence electron belong in this family.
What are the alkali metals?
400
The electronegativity of Argon.
What is 0? (none, not electronegative)
400
Give the electron configuration for Aluminum.
What is -2e, -8e, -3e?
500
Combustion is an example of this.
What is a chemical change?
500
A homogenous mixture composed of gases, liquids, or solids that is dissolved in liquid is called what?
What is a solution?
500
State the significance of the octet rule.
What is the attempt of atoms trying to obtain a stable configuration?
500
These two series are located at the bottom of the periodic table.
What is the lathanide and actinide series?
500
This element is the most electronegative and reactive of all elements.
What is fluoride?
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