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Elements on the left side of the table are called
Metals
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Elements on the right side of the table are
Non-metals
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Where are the Noble gases located on the periodic table?
Farthest right column
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What are metalloids
Elements that share metal and non-metal properties.
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What metalloid atoms are only found in trace quantities in the human body?
Boron
Silicon
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What do we call an atom that does not combine with other atoms?
Noble gases
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What are the three elementary particles?
Electrons (e-) negative
Protons (p+) positive
Neutrons (n) neutral
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_________ are the tiniest elementary particles.
Electrons
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Electrons
They carry a charge, and are not trapped in a nucleus; they are responsible for the chemical prperties of the atom.
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Protons
Carry a positive charge, equal and opposite to that of the electron. They are sequestered in the nubleus and cannot participate in chemical reactions.
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Neutrons
They have no charge, but like protons, have mass.
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________ ___________ is the basis for nuclear weapons, nuclear reactors, and nuclear medicine.
Nuclear Fission
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Prostate beams are used to treat
prostate, brain and lung cancers.
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PET
positron-emission tomography
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Which particle is often represented as a "planet" orbiting the "sun" (atomic nucleus)?
Electrons
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Which particles for the nucleus?
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Mass of proton
1.007 Daltons (atomic mass unit)
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Mass of neutron
1.009 Daltons (atomic mass unit)
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A neutral atom of a particular element has an equal number of ________ and ________
electrons and protons (so the + and - charges cancel out)
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The number of _______ can vary.
Neutrons. This variation changes the atom's mass but not its chemical properties. Atoms which vary in the number of neutrons are called isotopes.
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Atomic number is what
number of protons
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Mass number is what
Sum of protons and neutrons
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Atomic mass (weight) is what
Average mass of all naturally-occuring isotopes of an element.
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What atom commonly used in neclear medicine to study bone?
Ca 47 (20 protons + 27 neutrons)... Calcium
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What atom commonly used in nuclear medicine to destroy thyroid tissue?
I 131 (53 protons + 78 neutrons)... Iodine
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What atom commonly used in nuclear medicine for respiratory studies?
Xe 133 (54 protons + 79 neutrons).... Xenon
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What is the element that does not occur on Earth
Tc 43 (43 protons + 56 neutrons) ... Technetium
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You can't touch the __________ electron shells
Inner (electrons closely associated with the nucleus)
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Electrons __________ associated with the nucleus are more free to __________ and ________.
loosely; come; go
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The _______ ________ determines the chemical properties of the element.
outer shell
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Shells like to be ________, as in the noble gasses
full
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