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47 Cards in this Set

  • Front
  • Back
Substances made up of only one type of atom are called
ELEMENTS
What is the feature that distinguishes on element's atoms from another element's atoms?
NUMBER OF PROTONS
All atoms of the same element have the same number of
PROTONS
Atoms of different elements will have __ number of protons.
A DIFFERENT
Does a chemical reaction that breaks or forms bonds between atoms change the number of protons in the atom?
NO
The atomic number refers to the number of
PROTONS
An arrangement of elements in a table is called the
PERIODIC TABLE OF ELEMENTS
Atomic numbers increase by __ numbers.
WHOLE
What number describes the atomic nucleus?
MASS NUMBER
The mass number refers to the number of
PROTONS PLUS NEUTRONS
True or False: Atoms of the same element must have the same number of protons.
TRUE
True or False: Atoms of the same element must have the same number of neutrons.
FALSE
A subscript to the upper left of the symbol refers to the
MASS NUMBER
A superscript to the lower left of the symbol refers to the
ATOMIC NUMBER
The abbreviation for the name of an element is called
CHEMICAL SYMBOL
How do you determine the number of neutrons?
MASS NUMBER MINUS ATOMIC NUMBER
Different forms of the same element are called
ISOTOPES
Atoms of the same element with different numbers of neutrons are called
ISOTOPES
The chemical symbol written with the superscript and subscript numbers to the left is referred to as
ISOTOPE NOTATION
Hydrogen-1, Hydrogen-2 and Hydrogen-3 are examples of
ISOTOPES
In Hydrogen-2, the "2" refers to the
MASS NUMBER
How many protons in Hydrogen-3?
1
How many neutrons in Hydrogen-3?
2
How many electrons in Hydrogen-3 (if it is neutral)?
1
True or False: Protons in the nucleus repel each other.
TRUE
What holds the nucleus of the atom together?
STRONG NUCLEAR FORCE
True or False: Strong nuclear forces can only act on short distances within the atom.
TRUE
True or False: The repulsion of the protons for each other is greater than the strong nuclear force.
FALSE
The whole number in an element's box on the periodic table is the
ATOMIC NUMBER
The decimal number in an element's box on the periodic table is the
ATOMIC MASS
True or False: The atomic number increases by one whole number as you move from one element to the next on the periodic table.
TRUE
True or False: The atomic mass increases by one whole number as you move from one element to the next on the periodic table.
FALSE
What is the difference between the atomic mass and mass number?
MASS NUMBER = mass for one isotope (whole number); ATOMIC MASS = mass taking into acount all isotopes (decimal number)
True or False: Atoms are electrically neutral.
TRUE
True or False: Atoms can have unequal numbers of protons and neutrons.
FALSE
The location of the electrons outside the nucleus is referred to as the
ELECTRON CLOUD
The distance electrons are found from the nucleus is referred to as a(n)
ENERGY LEVEL
Atoms further from the nucleus have a __ energy state.
HIGHER
The first energy level can hold __ electrons.
2
The second energy level can hold __ electrons.
8
The third energy level can hold __ electrons.
18
In order to jump to a higher energy level, electrons have to __ energy.
ABSORB
When electrons fall back to their normal energy level, the __ energy in the form of __.
RELEASE; LIGHT
Energy levels are divided into smaller regions called
ORBITALS
The process of adding energy causing electrons to move into higher energy levels is called
ELECTRON EXCITATION
The release of energy as electrons to move into lower energy levels is called
EMISSION
True or False: All atoms release the same frequency of light during emission.
FALSE