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