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Ch 4 The Atom Questions and Answers 100% Solved
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Exam of 11 pages for the course Atom at Atom (Ch 4 The Atom)
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Ch 4 The AtomMatter is anything that has ____ and takes up ____. - answer shape or form; space
The primary distinction between mass and energy is that mass, however small can be
_____ when it is in a gravity field - answer weighed
A(n) _____ is a substance that cannot be broken down into any simpler substance by
ordinary means. - answer element
An ______ is the smallest single unit of an element that retains its chemical behaviors. -
answer atom
A ______ describes a substance in which atoms of different elements are chemically
bound together. - answer compound
A _______ describes the combination of two or more substances in such a way that
they are not chemically bound together. - answer mixture
A _________ is formed any time two or more atoms are chemically bound together. -
answer molecule
It is possible to have a molecule of a compound and also a molecule of an ________. -
answer element
Barium Sulfate suspension is a __________ - answer mixture
Barium Sulfate is a ____________ - answer compound
Barium is an ____________ - answer element
From the formula, CaWO4, how many atoms make up one molecule?
How many elements are there in this compound? - answer6; 3
The ________ number, or ______ number, indicates the number of positive charges
within the central nucleus. - answer atomic; Z
Electrons can actually be located anywhere within their _____ at any time. - answer
orbitals
, Our model of the atom using "shells" or "orbits" for the electrons helps us remember that
the electrons within an atom can only exist at certain, set _________ levels. - answer
energy
The volume of an atom mostly consists of _________________ - answer space
Objects seem solid because of the electrical _____________ between the "outer shells"
of their atoms. - answer repulsion
Each proton in an atom's nucleus is nearly _________ times the physical size and
weight of a single electron - answer2000
An electron has a mass of about 1/2000th amu, which stands for ______________
___________ ______________. - answer atomic mass unit
In the periodic table of elements developed by Mendeleev, each row or period repeats
the cycle of _________________ - answer properties
A neutron could be created by "smashing together" a ______ plus an _________ -
answerproton; electron
The emission of high-speed electrons from unstable neutrons in an atom's nucleus is
called ________ radiation, and is one of the forms of natural radioactivity. - answer beta
The maximum number of electrons which can occupy a shell number under any
conditions is equal to ________, where "N" is the shell number - answer2N^2
The outermost shell of the atom can never hold more than _____electrons, This
"_______ rule" overrides rule #1 - answer8 ; octet
The electron shell number is referred to by physicists as the _________ number -
answer principle quantum
The chemical behavior of an atom is determined only by the number and configuration
of electrons in the _______ shell - answer outermost
Neutral atoms with exactly 8 electrons in the outermost shell have no tendency at all to
connect with other atoms. They are said to be chemically ___________. - answer inert
To increase the Z number from any inert element to the next "larger" atom, a new
electron ______ must be started, and this is reflected on the periodic chart by starting a
new _________ - answer shell ; period
It is the __________ rule that accounts for the periodic or repeating layout of the chart
of the elements - answer octet
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