Metals - Are located on the left side of the stair step on the periodic table. Metals are mostly of a hard substance that can be very reactive.
Gold is a type of metal on the periodic table
Metalloids: Are elements on the periodic table that contain metals and nonmetal qualities
Nonmetals: Are located on the right side of the periodic table and are sometimes really reactive but mostly non-reactive.
Atomic number, Atomic Mass, Mass number
Each number tells part of the identity of the atom
The Atomic number is the same as the number of protons in the atom ( protons have a positive charge )
The Atomic mass is the same as the neutrons and the protons combined ( neutrons have a neutral charge )
The number of electrons is the same as the number of protons ( electrons carry a negative charge )
The pattern for drawing an atom is 2,8,8,8...
Valance electrons are electrons on the outermost shell of an atom
The reactants and on the left side and the products would be on the right. The arrow means to yield
Chemical and Physical Properties and Changes
Chemical Property: is a chemical of a pure substance that describes it’s ability to change into a different substance.
Physical Property: is the characteristic of a substance that can be observed without changing it into another substance.
Chemical Change: Changes in which one or more substances are combined or broke apart to form a new substance.
Physical change: Changes in a substance that does not change its identity.
The 5 signs of a chemical change…
Unexpected Change in temperature
Unexpected color change
Formation on bubbles
Formation of a Precipitate