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What is the basic unit of matter? (pg 35) Definition Card!!!!
The Atom (pg 35)
How many atoms would it take to make a row of about 1 cm ? (page 35)
100 million (page 35)
What makes up an atom? (page 35)
The subatomic particles, Protons, Neutrons, and Electrons (page 35)
Properties of sub atomic particles? (page 35)
Protons - Positively charged Same mass as neutronNeutrons - Neutrally charged, no charge ...
Properties of atoms? (Page 35)
1. They have equal #'s of protons and electrons.2. They are neutral charged because the charges cancel each other out
What is a chemical element? (page 36)
A pure substance, that consists entirely of one type of atom. (page 36)The # of protons (Atomic #) determines the type of element (page 36)
About how many elements are known? (page 36)
More then 100.
Isotopes properties (page 36)
Atoms of the same element that differ in the # of neutrons. (page 36)All have the same chemical properties b/c they have the same # of electrons (page 36)
The mass # (page 36)
The # of protons + the # of neutrons in an atom.
Radioactive Isotopes (page 36)
Elements where The nuclei break up over time, they become a different element and give off something like a photon, electron, or alpha particle.
Chemical Compounds? (page 37)
Substance formed by the chemical combination of two or more elements in definite proportions. (page 37)Physical and chemical properties differ from the elements that make...
Chemical Bonds? (Page 38)
Hold atoms together.Electrons that can form bonds are called valence electrons.3 Types-Ionic-Covalent- Van Der Waals ...
Ionic (page 38)
Electron transferred from one element to another.Ions are formed "charged atom"Ions attract and bond. (Page 38)
Covalent (Page 38)
Electrons shared between two elements. # of electrons shared = # of electron pairs shared.Results in a molecule.(Page 38)
Van Der Waals. (Page 39)
Attractions between molecules. (Page 39)