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22 terms

Chemistry Exam - Atomic Structure - Semester A

Atomic Structure - describe the characteristics of protons, neutrons and electrons in terms of location, charge and mass. - illustrate the structure of the atom by using the Bohr model, including the charge, relative mass and location of the sub-atomic particles. - use atomic mass, atomic number, and charge to identify neutral atoms, ions, and isotopes. - analyze the structure of the atom and describe the characteristics of the particles found there. - describe electron configurations for the fi…
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atomic structure
The atom consists of three component parts: Protons, Neutrons, and Electrons
alpha particles
positively charged particles containing two protons and two neutrons, is identical to the nucleus of a helium atom and about 4 times the mass of a hydrogen atom
anion
a negatively charged ion
atom
Smallest particle of an element
average atomic mass
the weighted average of the masses of all naturally occurring isotopes of an element
atomic number
the order of an element in Mendeleev's table of the elements
Bohr
a Danish physicist (1885-1962); created a new atomic model; described electrons as moving around the nucleus in fixed orbits and having a set amount of energy
cation
an ion with a positive charge
charge
the electrical charge of an electron
electron
a subatomic particle that has a negative charge
electron configuration
the arrangement of electrons in an atom
energy level
The specific amount of energy an electron has.
excited state
state in which an atom has a higher potential energy than it has in its ground state
ground state
the lowest allowable energy state of an atom
ion
atom that has a positive or negative charge
isotope
atoms of the same element that have different numbers of neutrons
neutron
a subatomic particle that has no charge and that is found in the nucleus of an atom
nucleus
the positively charged dense center of an atom
orbital
a region of space around the nucleus where an electron is likely to be found
percent abundance
the percentage of atoms of a particular isotope
proton
positively charged particle of an atom
valence electrons
electrons on the outermost energy level of an atom