Chapter 2: Terms Flashcards
Magnitude of the charge of the electron
1.602x10^-19
Atomic mass rule (1 amu = ?)
1.66054x10^(-24) grams
How large is an angstrom?
1A=1-5.0 x 10^-10 meters
Periodic Table: How are elements of similar properties arranged?
In columns
Periodic Table: What are the elements in a horizontal row referred to as?
A “period”
Which side of the Periodic Table (PT) do the metallic elements dominate?
The left and middle of the table
Where are nonmetallic metals located on the PT?
Upper right side
What is a diatomic molecule?
A molecule that contains two atoms
What charges are cat- and anions?
Cation = + Anion = -
What are ionic compounds?
Electrically neutral, containing both anion and cation, being both metallic and nonmetallic.
What are polyatomic molecules?
Atoms that are joined together, as in a molecule, but carry a net charge
What is the mass of a proton?
1.0073 amu
What is the mass of a neutron?
1.0087 amu
What is the mass of an electron?
5.486 x 10^(-4)
Dalton’s Atomic Theory
- Elements are made of extremely small particles called atoms.
- Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties.
- Atoms cannot be subdivided, created, or destroyed.
- Atoms of different elements combine in simple whole-number ratios to form chemical compounds.
- In chemical reactions, atoms are combined, separated, or rearranged.