Chemistry 1
Noble Gases (other than He) have this many valence electrons
8, Helium has a full valence shell with only 2 valence electrons. All other noble gases have a complete octet of 8 valence electrons.
True or False, elements are more stable in a chemical bond then on their own.
True
True or False, Sodium forms an anion in an ionic bond
false, sodium is metal and it gives up electrons to form a positive cation that is then attracted to a negative anion in an ionic bond.
Atoms share electrons in this type of bond
Covalent bond (between non metals ONLY.)
Single bonds share one pair of electron
Double bonds share two pairs of electrons
Triple bonds share three pairs of electrons
What type of bond is represented by this image
This Lewis drawing of the electron dot structure for oxygen is of a double bond.
This theory describes how the geometry of a molecule depends on how the valence shell electrons repel each other
VSEPR Theory
Molecules always contain a metal
False, molecules are covalently bonded nonmetals , formula units are ionic bonded (metal and nonmetal)
Name 3 out of the 4 different types subshells in electron configuration
s, p, d or f
This theory states that molecules are in constant motion
KMT or Kinetic Molecular Theory
polyatomic ion
A mole of copper has this many atoms
6.02 x 10 23
How many significant figures in 0.0120
What is 3
A complete combustion reaction always contains this reactant and these two products
Reactant - O2
Products - CO2 and H2O
The type of bond where electrons are transferred, forming a cation and anion that attract each other.
Ionic Bond
The correct chemical formula for iron (III) phosphate.
What FePO4?
True or False, When hydrogen bonds with F,O,or N a very weak hydrogen bond is formed.
False, when hydrogen bonds with F, O, N the strong difference in electronegativity between the 2 elements forms a STRONG, highly polar covalent bond.
According to VESPR Theory, what is this shape
Tetrahedral
Put the following in order of increasing electronegativity : F, Ca, Br, Ga, K
K, Ca, Ga, Br, F
Theoretical yield is your yield from the reaction activity with your lab group
False, theoretical yield is the maximum yield you could have using dimensional analysis. Actual yield is derived from your lab group results.
This is the lowest temperature possible where there is not movement of molecules
absolute zero, 0 Kelvin
This is responsible for metals being excellent conductors of electricity.
In metals, ions are surrounded by the "sea of electrons", which make for excellent conductors of electricity and heat.
Name 3 ways to increase a rate of a reaction
Add catalyst
Increase surface area of reactant (crush up large tablets)
Increase concentration of reactants
Increase temperature (average kinetic energy)
The mass (grams) of the reactants = the mass (grams) of the products in a chemical reaction OR
The number of atoms of reactants = the number of atoms of products
Both of these sentences support this Law in chemistry
Law of Conservation of Matter
True/False
In a non polar covalent bond there is a large difference in electronegativity between atoms.
False - Non polar covalent bonds have an almost equal sharing of electrons and a similar electronegativity. Polar bonds have a difference in electronegativity. Ionic bonds have the largest difference in electronegativity.
The measure of the ability of an atom to attract electrons is called its
electronegativity?
Which is a weaker intermolecular force, Hydrogen bonding or London Dispersion Forces?
London Dispersion forces or Van Der Waals forces are the weakest IMFs
MgCl2 is called Magnesium Dichloride
NO, if you see a metal in your compound, run from the prefixes
What is the formula for phosphorous tetrasulfide
PS4 not XBox (lol)
An element has similar chemical properties as nitrogen and phosphorus. It has an atomic number greater than arsenic but less than bismuth. Use the periodic table to identify the element.
antimony?
What is the balanced equation for the synthesis of water
2H2 + O2 ---> 2H2O