Physical Science test #6

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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.


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