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Mass Number =
(Number of Protons) + (Number of Neutrons)
is a type of code that describes how many electrons are in each energy level of an atom and how the electrons are arranged within each energy level.
An electron configuration table
are positively charged particles found within atomic nuclei
Protons
are negatively charged particles that surround the atom's nucleus
Electrons
are uncharged particles found within atomic nuclei
Neutrons
The is the number located in the upper left corner. # of protons.
atomic number
is the number located on the bottom.
atomic weight
Number of Neutrons =
Mass Number - Atomic Number
Number of Electrons =
Number of Protons = Atomic Number
ALL THE ATOMS OF AN ____ CONTAIN THE SAME # OF PROTONS (HAVE THE SAME ATOMIC #)
ELEMENT
are any of the different types of atoms of the same chemical element, each having a different atomic mass (mass number).____of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons. Therefore, the same element have different mass numbers.
Isotopes
The attraction between molecules is an _______.
intermolecular
force.
______ forces are much weaker than________ forces
Intermolecular
intramolecular
What is the strongest of all intermolecular forces?
Ion-Dipole forces
_____ forces exist between neutral polar
molecules.
Dipole-dipole
The forces holding solids and liquids together are called
________.
intermolecular forces.
The covalent bond holding a molecule together is an
______.
intramolecular force.
The attraction between molecules is an________.
intermolecular
force.
Breaking intermolecular forces is always
Endothermic
Forming intermolecular forces is always
Exothermic