The Atom
One of the first people to state that matter is made up of atoms was
Democritus
Who created the Bohr model?
Niels Bohr
A charged atom that results from the loss or gain of an electron
Ion
What is a Nucleus?
Dense, positively charged mass in the center of an atom
How do you find the amount of Neutrons in an atom?
Atomic mass - Atomic number
Who provided the first evidence that atoms contain subatomic particles?
Thomson
Who created the solid sphere model of the atom?
Dalton
Atoms of the same element having different numbers of neutrons.
Isotope
What is a Proton?
Positively charged subatomic particle found in the nucleus
How many neutrons in Carbon-14?
8 Neutrons
Who developed the gold foil experiment. He was the first to introduce the concept of a dense, positively charged atomic nucleus at the center of an atom.
Ernest Rutherford
Who created the Plum-pudding model?
J.J. Thomson
Formed when an atom loses one or more electrons. They have more protons than electrons
Cation
What is an Electron?
A negatively charged subatomic particle
What is the atomic mass of Potassium?
39.0983 rounded to 39
How many electrons can the 2nd energy level hold?
8 electrons
Who created the nuclear model?
Ernest Rutherford
Formed when an atom gains one or more electrons. They have more electrons than protons.
Anion
What is a neutron?
A neutral charged subatomic particle
How many neutrons in Aluminum-27?
14
What is the Electron Cloud Model?
The area surrounding an atom's nucleus where electrons are most likely to be found
Who created the electron cloud model?
Erwin Schrödinger
An atom has 9 protons and 10 electrons. What is its charge?
-1
What is the Ground State?
Term for an atom whose electrons have the lowest possible energies
How many electrons in an flourine-20 as an ion?
10 electrons