Periodic Table
How many periods are shown on the periodic table?
7
What are the 3 main states of matter?
Solid, liquid, gas
What is the conservation of matter?
Matter cannot be created or destroyed. The same amount of atoms should be on both sides of the equation.
A chemical property is a property that we can only see or observe when they react (or do not react)
Name all 3 subatomic particles.
Protons Neutrons Electrons
When moving from left to right across the periodic table, what increases?
Atomic Number
What happens to the molecules as you move from solid to liquid to gas state?
They increase in energy because of the heat. The molecules move further apart and they continue moving.
Is this equation balanced?
2NaCl --> Na2 + 2Cl
Yes. Everything matches
Give 2 examples of chemical properties
pH, reactivity, toxicity, flammability, etc.
What kind of reaction is this? (Synthesis, decomposition, single replacement or double replacement)
NaClO3 ---> NaCl + 3O
Decomposition
What is the rule for sharing valence electrons when a compound is being made
What is octet rule
What is the atomic number of neon (Ne)?
10
Balance this equation. H2O2 --> H2O + O2
2H2O2 --> 2H2O + O2
What is the definition of a physical property?
A Physical Property is one that can be observed and seen without changing what the substance is.
What is the formula for density?
Density = Mass/Volume (Mass over volume)
What is the 25th element called?
Manganese or Mn
What is in the nucleus in the atom?
protons and neutrons
Balance this equation
C3H8 + O2 --> CO2 + H2 O
C3H8 + 5O2 --> 3CO2 + 4H2 O
Give 3 examples of physical properties
Color, shape, state, density, conductivity, mass, weight, volume
What is the difference between a chemical change and a physical change
A chemical change will make something new, a physical change will not.
How are ions (atoms with an overall negative or positive charge) formed?
By losing or gaining valence electrons
Are Alkali Metals more likely to loan out it's valence electron(s) or to gain valence electrons?
More likely to loan out it's valence electrons.
Balance this equation
ZnS + AlP --> Zn3P2 + Al2S3
3ZnS + 2AlP --> Zn3P2 + Al2S3
Give 2 examples of a chemical change, and 2 examples of a physical change
Answers will vary
Who was the person to organize the periodic table?
Dmitri Mendleev