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Chemistry 1. Parts of an Atom Questions and Answers Rated A+
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Chemistry 1. Parts of an AtomCadmium has eight naturally occurring isotopes. What do the isotopes have in
common? - answer Number of protons
Which atom has the greatest mass? - answer An atom with 8 protons, 8 neutrons, and 8
electrons
An ion of aluminum has a charge of 3+. The ion contains 10 electrons. How many
protons does a neutral atom of aluminum process? - answer13
The atomic number of polonium is 84. The atomic number of lead is 82. Which must
occur for polonium to be transformed into lead. - answer An atom of polonium, must
lose two protons.
The atomic mass and abundance of Si-28 is 27.977 amu and 92.2%. The atomic mass
and abundance of Si-29 is 28.976 amu and 4.7%. The atomic mass and abundance of
Si-30 is 29.974 amu and 3.1%. Which is the average atomic mass of silicon? -
answer28.09 amu
A sulfur atom contains 16 protons and 16 electrons. What must occur for this sulfur
atom to become a sulfur ion with a charge of 2-? - answerIt must gain two electrons.
An atom of uranium, whose atomic number is 92, transforms in nature to an atom of
thorium plus a nucleus of helium, whose atomic number is 2. What is the atomic number
of thorium? - answer90
Which particle is a neutron most equal to in mass? - answerA proton
A particle contains 12 protons, 12 neutrons, and 10 electrons. What is the identity of the
particle? - answerA magnesium ion
Isotope A contains 56 protons and 80 neutrons. Isotope B contains 55 protons and 81
neutrons. Isotope C contains 57 protons and 80 neutrons. Isotope D contains 56
protons and 74 neutrons. Which isotopes have the same mass number? - answerA and
B
Fluoride-19 has an atomic number of 9 and a mass number of 19. How many neutrons
does an atom of fluoride-10 contain? - answer10
Which qualities describe the mass and charge of an electron? - answerMass 1/1836
that of a proton; negative charge.
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