10-27 Beginning of Matter: Properties and Change
EQ: What are the parts of an atom and its terminology?
1) Element: Contains only one kind of atom
2) Molecule: Contains two or more atoms
3) Atom: Smallest part of an element
There are 3 parts of an atom
1) Proton = positive charge (next largest part)
2) Element = negative charge (smallest part)
4) Nucleus: Center of an atom where protons and neutrons are located
5) Atomic Number: The number of protons in the nucleus
6) Atomic Mass: The number of protons and neutrons
EQ: What is the periodic table used for? Info on periodic table
1) The periodic table is a tabular arrangement of chemical elements, organized on the basis of their atomic number (# of protons in the nucleus), electron configuration, and recurring chemical properties.
2) Alkali and Alkaline metals are known as bases defined as being the opposite of acids. PH values lower than 7 are acidic, and PH values higher than 7 are alkaline (basic).
3) Transition metals: Have an amazing ability to bond with a variety of other elements to form alloys (a material composed of two or more metals or metal and a nonmetal)
Example: Brass is an alloy made of copper and zinc
4) Halogens: (means salt giver) Most are produced from minerals or salt. All halogens form acids when bonded with hydrogen. Most common halogen bonding is NA + CL = table salt.
5) Noble gases: Also meaning “inert gases” meaning completely unreactive
6) All elements can be classified as nonmetals, metals or metalloids (properties in between, or is a mixture of, those of metals and nonmetals) Most common are Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As) and Antimony (Sb)