Post by stoaton on Nov 30, 2005 21:35:32 GMT -5
Here's the Chapter 3 Study Guide i made.
Use your packet for the scientist names and dates and the element symbols.
Nucleus- very small, very dense and positively changed body at the center of an atom.
Electron Cloud- the space surrounding the nucleus, which contains electrons.
Valence Electrons- electrons in the highest energy level of an atom (farthest from the nucleus)
Meteorologist- study of the atmosphere
Electrode- device that carries electricity from one medium to another
Cathode- negatively changed electron
Anode- positively charged electron
Rheostat- a device that adjusts the electrical current in a circuit
Ground State- the lowest energy level an electron can occupy
Quantum-
Suborbetal- region of space occupied by electrons
*Atomic Number- number of protons in an atom that identifies an element
*Atomic Mass- The weighted average mass of all the isotopes of an element
Isotopes- an atom with the same number of protons and a different number of neutrons from other atoms, of the same element; atoms of an element with different mass numbers
Mass Number- sum of the proteins and neutrons in an isotope, also identifies the isotope.
· Are on the periodic table
Electron Affinity- The force one atom can use to take an electron away from another atom.
Ionization Energy- Energy necessary to remove an electron from an atom.
Periodic- Repeating according to a pattern.
Precipitate- solid formed in a chemical reaction
Organic Chemistry- study of carbon compounds
Inert- will not chemically react
Ream- 500 of something
Gross- 144 of something
Dozen- 12 of something
Isotopes-
Radioactive- Have unstable nuclei
Half life- is the amount of time it takes for half the radiation in a sample to decay.
1 = ½ = ¼ = 1/8 = 1/16 and so on….
-After 10 half lifes have passed you can not detect the radiation
-Use your packet. to study the 30 elements and their symbols
Family Names
Group 1 = Alkali Metals
Group 2 = Alkaline Earth Metals
Group 3-12 = Transition Metals
Group 13 = Boron Family
Group 14 = Carbon
Group 15 = Nitrogen
Group 16 = Oxygen
Group 17 = Halogen
Group 18 = Noble Gases
Definitely on the test!
Dalton’s 4 Parts
1.All matter is composed of atoms which are indivisible
2. All atoms of the same element are alike
3.Atoms of different elements are different
4.Atoms of different elements may combine specific ratios to form compounds
The Modern Periodic Law
The chemical and physical properties of the elements are periodic functions of their atomic numbers
Look in packet for scientist dudes.
Use your packet for the scientist names and dates and the element symbols.
Nucleus- very small, very dense and positively changed body at the center of an atom.
Electron Cloud- the space surrounding the nucleus, which contains electrons.
Valence Electrons- electrons in the highest energy level of an atom (farthest from the nucleus)
Meteorologist- study of the atmosphere
Electrode- device that carries electricity from one medium to another
Cathode- negatively changed electron
Anode- positively charged electron
Rheostat- a device that adjusts the electrical current in a circuit
Ground State- the lowest energy level an electron can occupy
Quantum-
Suborbetal- region of space occupied by electrons
*Atomic Number- number of protons in an atom that identifies an element
*Atomic Mass- The weighted average mass of all the isotopes of an element
Isotopes- an atom with the same number of protons and a different number of neutrons from other atoms, of the same element; atoms of an element with different mass numbers
Mass Number- sum of the proteins and neutrons in an isotope, also identifies the isotope.
· Are on the periodic table
Electron Affinity- The force one atom can use to take an electron away from another atom.
Ionization Energy- Energy necessary to remove an electron from an atom.
Periodic- Repeating according to a pattern.
Precipitate- solid formed in a chemical reaction
Organic Chemistry- study of carbon compounds
Inert- will not chemically react
Ream- 500 of something
Gross- 144 of something
Dozen- 12 of something
Isotopes-
Radioactive- Have unstable nuclei
Half life- is the amount of time it takes for half the radiation in a sample to decay.
1 = ½ = ¼ = 1/8 = 1/16 and so on….
-After 10 half lifes have passed you can not detect the radiation
-Use your packet. to study the 30 elements and their symbols
Family Names
Group 1 = Alkali Metals
Group 2 = Alkaline Earth Metals
Group 3-12 = Transition Metals
Group 13 = Boron Family
Group 14 = Carbon
Group 15 = Nitrogen
Group 16 = Oxygen
Group 17 = Halogen
Group 18 = Noble Gases
Definitely on the test!
Dalton’s 4 Parts
1.All matter is composed of atoms which are indivisible
2. All atoms of the same element are alike
3.Atoms of different elements are different
4.Atoms of different elements may combine specific ratios to form compounds
The Modern Periodic Law
The chemical and physical properties of the elements are periodic functions of their atomic numbers
Look in packet for scientist dudes.