Physical Science test #6
Find the charge of the cadmium cation in cadmium bromide, CdBr2.
+2
How many hydrogen atoms does a compound have if it is a hydrocarbon and it's carbon atom skeleton is c=c-c=c.
6 hydrogen
Metallic bonds
A bond formed by the attraction between positively charged metal ions and the electrons around them
Covalent bond
A bond formed when atoms share one or more pairs of electrons
Molecular formula
A chemical formula that shows the number and kinds of atoms in a molecule, but not the arrangement of atoms
Carbohydrates
A class of molecules that includes sugars
Amino cells
A compound of a class of simple organic compounds that contain a carboxyl group and an amino group and combine to form proteins
Organic compound
A covalently bonded compound that contains carbon, excluding carbonates and oxides
Polymer
A large molecule that is formed by more than five monomers, or small units
Identify the following compounds as alkanes, alkenes, or alcohols based on their names: A. 2 methylpentane B. 3 methaloctane C. 1 nonene D. 2 butanol E. 3 heptane F. Cyclohexanol
A. Alkane B. Alkane C. Alkene D. Alcohol E. Alkene F. Alcohol
Name the following ionic compounds, and specify the charge of any transition metal cations. A. FeI2 B. MnF3 C. As2O5 D. CuS
A. Iron(II) iodide -1 B. Manganese (III) flouride +2 C. Arsenic pentoxide +2 D. Copper (II) Sulfide -1
Name the following covalent compounds. A. SeO2 B. SiI4 C. As2O5 D. P4S3
A. Selenium oxygen B. Silicon iodine C. Arsenic oxygen D. Phosphorus sulfur
Identify which two of the following substances will conduct electric currents, explain why. A. Aluminum foil B. Sugar C. Potassium Hydroxide
A. Yes; it's a metal B. No; it's a covalent bond C. Yes; it's ionic
Determine if the following compounds are likely to have ionic or covalent bonds. A. Magnesium oxide B. Strontium chloride C. Ozone D. Methanol
A. ionic B. ionic C. covalent D. covalent
Determine the chemical formulas for the following ionic compounds. A. Magnesium sulfate B. Rubidium bromide C. Chromium fluoride D. Nickel carbonate
A.MgSO4 B.RbBr C.CrFr2 D.NiCo3
What is the difference between alkanes, alkenes, and alkynes?
Alkanes = single bond; Alkenes = double bonds; Alkynes = triple bond
Polyatomic ion
An ion made of two or more ions
Proteins
An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells
What is the 4th member of the alkanes series?
Brotane = C4H10
Predict which molecules have a greater attraction for each other: C3H8O molecules in liquid rubbing alcohol or CH4 molecules in methane gas
C2H8O
Identify which compound is an alkane: CH2O, C6H14, or C3H4.
C6H14
What is the 10th member of the alkanes series?
Decane = C10H22
Why are all S-H bonds longer than O-H bonds?
Depends on how many electrons are involved in forming a bond
What is the 2nd member of the alkanes series?
Ethane = C2H6
What is the 7th member of the alkane series?
Heptane = C7H16
What is the 6th member of the alkane series?
Hexane = C6H14
An atom of the element iodine, I, has much more attraction for electrons than an atom of strontium, Sr, does. What kind of bonds are likely to form between atoms of the two elements?
Ionic bonds
Explain why gas, which is made up of mostly SiO2, is often used to make cookware
It heats evenly and slowly, therefore it cooks food evenly
Why can there be no such compound as CBr5?
It violates the "eight electron rule" CBr4 is acceptable
What is the first member of the Alkanes series?
Methane = CH4
What is the 9th member of the alkane series?
Nonane = C9H20
What is the 8th member of the alkane series?
Octane = C8H18
What is the 5th member of the alkane series?
Pentane = C5H12
What is the 3rd member of the alkane series?
Propane = C3H8
Bonded angle
The angle formed by two bonds to the same atoms
Chemical structure
The arrangement of the parts of a whole
Ionic bond
The attractive force between oppositely charged ions, which form when electrons are transferred from one atom to another
Chemical bonds
The attractive force that holds atoms or ions together
Bonded length
The average distance between the nuclei of two bonded atoms
Identify which of the bonds in calcium hydroxide, Ca(OH)2, are ionic and which are covalent.
The bonds between calcium and hydroxide are ionic and between oxygen and hydrogen are covalent
Empirical formula
The composition of a compound in terms of the relative numbers
Does nitrogen tetroxide, N2O4, have covalent or ionic bonds?
This is a covalent because oxygen can't form ionic.
