A&P – Flashcard

an element with the atomic number 6
6 protons/neutroms
what does the formula H2O mean
2 hydrogen 1 oxygen
which isotope is most likely to be used to study the thyroid gland?
I-123 I-124
Atomic radiation is useful in treating cancer because..
radiation harms cancer cells more readily than it does most non-cancer cells
A chemical reaction which pairs of 2 different molecules trade positions with each other
exchange reaction
as a group compounds that release ions when dissolved in water are called
electrolytes
a decomposition reaction can be symbolized as
AB-> A + B
the first electron shell of an atom can hold a maximum of how many atoms
2
if an atom has 3 electrons in its second shell, first shell being full, it will tend to do what
lose 3 electrons from its second shell
the atoms of the isotopes of a particular element vary in a number of
neutrons
chemistry deals with
a composition of substances, changes that occur in substances and substances that make up organisms
a person that has alkalosis if the blood pH does
rises about 7.4
the difference in hydrogen ion concentration in solutions with pH4 and pH5 are
tenfold
The unique 3D structure of a proton molecule is maintained largely by
hydrogen bonds
T/F an electrolyte is a substance that ionizes in water
True
T/F an acid is defined an electrolyte that releases hydroxyl ions in water an example is sodium hydroxide
False
T/F A substance that releases hydrogen ions in water is a base
false
T/F water is an example of a compound
True
T/F An atom that has gained or lost electrons is called an ion
True
T/F Sodium and chloride ions combine readily because they both tend to lose electrons
False
T/F the number of protons within an atom of an element is equal to its atomic weight
False : Weight- Number+

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