Matter and Energy
What are the four types of matter?
Elements, compounds, homogeneous mixtures, heterogeneous mixtures
What are the elements on the Periodic Table organized by?
Increasing atomic number
What is one group on the periodic table that contains metals, nonmetals, and metalloids?
Group 14, 15, or 16
Which bond is more polar: C-N or O-F
O-F
What are the reactants of this single replacement reaction?
Zn + 2HCl -> ZnCl2 + H2
Zn + 2HCl
A mixture of water and alcohol is able to be separated by distillation. What physical property does distillation separate based on?
Boiling point
Why are atoms neutral?
The number of protons equals the number of electrons
Which group of the periodic table contains all three states of matter?
Group 17
Compare the polarity of a H-N bond to an O-O bond.
H-N is a polar bond, O-O is nonpolar
What is the formula of the compound iron (II) oxide?
FeO
What three phase changes are exothermic?
Solidification, condensation, and deposition
What is an electron configuration that represents a sodium atom in the excited state?
2-7-2
2-7-1-1
1-8-2 etc.
What are allotropes?
Describe the polarity of the molecule CH3F.
Polar
What type of reaction is this?
2NaCl + MgBr2 -> 2NaBr + MgCl2
Double replacement
How much heat energy is required to completely melt 30 grams of solid H2O at 0oC?
10,020 Joules
What is the electron configuration for the element in period 3 and group 16?
2-8-6
H, N, O, F, Cl, Br, I
In terms of intermolecular forces, explain why H2O has a higher boiling point than CH4.
H2O has stronger intermolecular forces (Hydrogen bonds)
What is the correct name for the compound TiCl3?
Titanium (III) chloride
Given this reaction: Cl2 -> Cl + Cl
What happens with the energy and bonds during this reaction?
Energy is absorbed and a bond is broken
They have the same number of protons, but different number of neutrons
What is the general trend in atomic radius and electronegativity as the elements of Period 3 are considered in order of increasing atomic number?
Atomic radius decreases and electronegativity increases
What are possible properties of the compound CHN based on the types of bonds it contains?
Soft solid
Low melting and boiling points
Does not conduct electricity
Balance this equation: P4 + Cl2 -> PCl3
P4 + 6Cl2 -> 4PCl3