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15 Cards in this Set

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What information can be determined from the placement of the element on the periodic table?
PROPERTIES, ATOMIC STRUCTURE
Elements that react similarly are called a(n)
GROUP OF ELEMENTS
A horizontal row on the periodic table lists elements in order of
INCREASING ATOMIC NUMBER
The row number indicates the number of
ENERGY LEVELS WITH ELECTRONS
The outermost region of the electron cloud containing electrons is called the
VALENCE SHELL
Electrons in the outermost energy level are called
VALENCE ELECTRONS
Describe the valence shells of stable atoms.
FULL or EMPTY
Why don't elements in group 18 (noble gases) react easily with other elements?
FULL VALENCE SHELL
An abbreviation of the element's name is the
CHEMICAL SYMBOL
What is the difference between Co and CO
Co = element, CO= compound
True or False: An element can have more than one mass number.
TRUE
The average mass of all known isotopes of an element is the
ATOMIC MASS
The unit for atomic mass is
ATOMIC MASS UNIT (amu)
The mass of 1/12 the mass of a C-12 atom is equal to a(n)
AMU
What is the atomic mass of Hydrogen-3?
3 amu