Atomic Theory
The "building block" of all matter, it is the smallest particle that can still be considered an element.
What is am atom?
The dense center of an atom.
What is the nucleus?
The periodic table is sorted in ascending order by this number.
What is the atomic number?
These electrons have the highest energy and help atoms to bond with other atoms.
What are Valence Electrons?
The overall charge of an atom.
What is a neutral charge?
The positively charged particle in an atom.
What is a proton?
The name of the verticle column in the periodic table
What is a group?
The ease and speed with which elements combine or reacts.
What is reactivity?
An atomic model that showed atoms have negatively charged particles and looked like ice cream.
What is Thompson's Model?
The number of protons in an atom.
What is the atomic number?
This group of elements is usually hard, conducts electricity, and has a high melting point.
What is a transition metal?
A substance that conducts electricity under certain conditions but not others?
What is a semiconductor?
The measurement that scientists use to measure the mass of an atom.
What is the atomic mass unit (amu)?
What is an Isotope?
The element that usually has 45 neutrons.
What is Bromine?
The chemical bond formed with two atoms share electrons.
What is a covalent bond.
Rutherford's Model proved atoms are mostly space by shooting positively charge ions through this material.
What is gold foil?
The ratio of the mass between an electron and a proton
What is 1/1840?
This group of elements is not reactive and normally found in nature not as a compound
What are noble gases?
The element group that often bonds with Alkali and Alkaline metals to form salts.
What are Halogens?