Chemistry 1 Flashcards
(25 cards)
Postulated the “solar system” view of the atom; Consistent with Rutherford’s gold foil experiment.
Niels Bohr (1913)
Proposed that an atom is a homogenous unit comprised of both positive and negative elements.
Plum Pudding Model by JJ Thompson
Disproved the Plum Pudding Model
Rutherford’s Gold Foil Experiment
Discovered the alpha particle
Rutherford
A particle that is comprised of a helium atom, used in the gold foil experiment.
Alpha Particle
Atoms are mostly _________ but have a ___________ center of mass.
empty space; dense
_________ hang out in surrounding orbitals.
electrons
Defined as the atomic mass center where protons and neutrons hang out.
nucleus
Outer shell electrons are called _____________.
Valence electrons
A quantized view of the atom that places the electrons into defined shells.
Bohr’s Model
The number of protons and neutrons
Atomic Mass
The number of protons ONLY; Defines the element
Atomic Number
Same element, different atomic mass and the number of neutrons varies.
Isotopes
Too high of an atomic mass means the element is __________.
Radioactive
Atoms prefer to have ______ atoms in their outer shell.
eight
______ number defines how many electrons are in the outer shell.
Group
The tendency of an atom to gain/lose an electron in order to gain an octet.
Ionization
A positively charged ion.
Cation
A negatively charged ion.
Anion
Defines whether or not an element will gain or lose an electron in order to form an octet.
Electronegativity
Gains electrons and is located on the right side of the periodic table.
Electronegative
Loses electrons and is located on the left side of the periodic table.
Electropositive
The most electronegative element
Fluorine ( F )
The vertical columns that run up and down the periodic table.
Groups
