Week 25

Molar mass: the weight of one mole of any chemical compound.

Empirical formula: the simplest ratio of atoms present in a molecule.

Molecular formula: a chemical formula that shows the number and kinds of atoms in a molecule.

Molar volume: the volume occupied by one mole of a substance in liquid, solid or gas form.

STP: Standard Temperature and Pressure.

 

Percent Composition:

If i were to find the percent composition of a human, i would put them into  these seven categories:

Head.

Chest.

Torso.

Legs.

Arms.

Feet.

and Hands.

Week 21

1. Sodium Chloride : Also known as table salt, sodium chloride is an ionic compound.  When mixed with water, it prevents the bonding of the snow-ice and road surface.  Two brand names are Cleanoz and Na-zone.

2. Magnesium Chloride: This is an anti-corrosive and helps protect your vehicles and equipment from rust and corrosion unlike most road salts that produce mud and create rust.  This is an ionic compound.  One brand name is Dust-off

3 Potassium Chloride: This is an ionic compound.  Although it works well as a road salt, it is bad for the environment because it is most frequently used as a fertilizer for plants.

Most companies use ionic over covalent.  I would guess they use chloride over the other because it has the ions to disperse and pull the water molecules out of ice formation and because it is no harm to humans.

Week 18(two)

Anions:

1. Acetate, charge of negative one.

2. Oxide, charge of negative two.

3. Tungstate, charge of negative two.

4. Carbide, charge of negative four.

5. Cyanide, charge of negative one.

6. Borate, charge of negative three.

7. Sulfate, charge of negative two.

8. Carbonate, charge of negative two.

9. Selenide, charge of negative two.

10. Nitride, charge of negative three.

11. Silicide, charge of negative four.

12. Pyrophosphate, charge of negative four.

13. Dichromate, charge of negative two.

14. Tartrate, charge of negative two.

15. Phosphite, charge of negative three.

16. Fluoride, charge of negative one.

17. Iodide, charge of negative one.

18. Bromide, charge of negative one.

19. Azide, charge of negative one.

20. Telluride, charge of negative two.

Week 18

Cations:

1. Ammonium, charge of plus one.

2. Calcium, charge of plus two.

3. Nickel, charge of plus two.

4. Zirconium, charge of plus two.

5. Thallium, charge of plus one.

6. Iron, charge of plus three.

7. Tin, charge of plus four.

8. Magnesium, charge of plus two.

9. Lithium, charge of plus one.

10. Potassium, charge of plus one.

11. Silver, charge of plus one.

12. Silicon, charge of plus four.

13. Titanium, charge of plus two.

14. Zinc, charge of plus two.

15. Mercury, charge of plus two.

16. Gallium, charge of plus three.

17. Lead, charge of plus four.

18. Tungsten, charge of plus two.

19. Rubidium, charge of plus one.

20. Indium, charge of plus one.

Week 14

1. The properties all metals share are they are all reactive, they are good conductors.  They also are all shiny, can make wire and get shaped.  They also ring when you hit them.

2. The nonmetal elements are, Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Aluminum,  Phosphorus, Sulfur, Chlorine, Argon, Gallium,  Selenium, Bromine, Krypton, Indium, Tin, Iodine, Xenon, Thallium, Lead, Bismuth, Polonium, & Astatine.

Week 13

Periodic Law: The principle that chemical properties of the elements are periodic functions of their atomic numbers.

Electronegativity: The tendency of an atom or radical to attract electrons in the formation of an ionic bond

Cation: A positively charged ion i.e., one that would be attracted to the cathode in electrolysis.

Anion: A negatively charged ion, i.e., one that would be attracted to the anode in electrolysis.

Electron affinity: The energy change when an electron is added to the neutral species to form a negative ion.

Reactivity: Responsiveness to stimulation.

Atomic radius:  Measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the surrounding cloud of electrons.

Ionization energy: The minimal energy required to remove (to infinity) one mole of electrons from gaseous atoms or ions.

Alkali metals: Any of the highly reactive elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table.

Metalloids: An element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals.

Alkaline earth metals: Somewhat reactive metals that lie in the Group 2A(2) of the periodic table.

Noble Gases: Any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table.

Halogens: Any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table.

Chalcogens: Chemical elements in group 16 (old-style: VIB or VIA) of the periodic table.

Transition metals: Any of the set of metallic elements occupying a central block (Groups IVB–VIII, IB, and IIB, or 4–12) in the periodic table.

Lanthanides: Any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table

Actinides: Any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table.

Main group elements: Elements in groups whose lightest members are represented by helium, lithium, berylium, boron, carbon, nitrogen, oxygen and fluorine as arranged in the periodic table.

Representative elements: Elements within the first two families (Groups I and II on the far left) and the last six families or groups (on the right) of the periodic table.

Rare earth metals: A set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides plus scandium and yttrium.