Periodic Table
What does the octet rule state?
Atoms need 8 valence electrons to become stable
What is kinetic comedy?
Form of energy due to motion
Complete the sentence: Particles are_____ in motion.
Always
What is a synthesis reaction?
2 or more reactants form a product
What is the definition of a chemical bond?
A chemical bond is the force that holds and keeps the atoms together in a substance by sharing or giving and receiving electrons to maintain and reach stability.
How many valence electrons does the element Lithium have?
One valence electron
State the law of conservation of mass
Energy can not be created nor destroyed, only changed.
What type of relationship does Boyle’s law state?
Inverse
What type of reaction is in the following: 2NaBR + Ca(OH)2→ 2NaOH CaBr2
Double replacement
What are valence electrons, and why do they play a key role in chemical bonding?
Valence electrons are the outermost electrons within an atom. They are important because valence electrons are the ones involved in the creation of bonds with other atoms, in order to make molecules.
How is ionizing energy related to the number of valence electrons?
Ionization energy tends to increase, when the number of valence electrons
Name what point of a roller coaster where kinetic energy is the highest and name the point where potential energy is the highest.
Potential- right before it goes down
Kinetic- in motion, dropping
Are the molecules in a gas closer or further together than liquid?
Further
True or false: Decomposition is a compound split into one or less substances
False
Which type of bond is generally stronger, ionic or covalent? Why?
Ionic bonds are generally stronger than Covalent bonds. The reason for this is, is because the attraction between oppositely charged ions tend to be stronger than the pull from shared electrons.
How does the electronegativity get affected as you move right on the periodic table?
As you move to the right across the periodic table, electronegativity tends to rise, because atoms have more protons that pull in electrons.
Q=mcDT
Explain how Charle’s law relates to a car tire and how does it use direct relation?
Charle’s Law explains that as the temperature inside a car tire increases, the molecules in the air move faster, which causes the tire to expand, due to the fact that the volume and temperature share a direct relationship.
What are the products for a combustion reaction?
H2O and CO2
Which type of bond forms when there is a large difference in electronegativity between two atoms?
When two atoms have a large difference in electronegativity, they form an ionic bond. The reason for this is because one atom basically takes an electron from the other.
How does the atomic radius change, as you move down a group in the periodic table?
As you move down a group, the atomic radius increases, because more electron shells are added, which makes the atom larger, even though there is an increase in protons.
What is the heat of energy required to change a substance from solid?
Head of Fusion
Solve this equation: A weather balloon is partially filled with helium to a pressure of .89 atm. It occupies a volume of 23mL. What will the volume of the balloon be if the Charle’s Law explains that as the temperature inside a car tire increases, the molecules in the air move faster, which causes the tire to expand, due to the fact that the volume and temperature share a direct relationship.
pressure increased to 1.18 atm? (Round to the nearest hundredth decimal place)
17.35
What is the product of this: CaCl2 + K2SO4->
CaSO4 + 2KCl
Why do metals conduct electricity but ionic solids typically do not. (In a solid state)?
Metals can conduct electricity, because there is more room for their electrons to move around. Also, when they are in a solid ionic compound, the ions stay put, and are not able to move around.