How are atoms and elements
related?
a. some elements contain only one type of
atom, while other elements contain more than
one type.
b. every element contains many different types
of atoms.
c. every element contains one type of atom.

C. Every element contains one type of atom.

Explanation:

Every atom can be labeled as only one kind of element.  So there are gold atoms, iron atoms and so on.  When you say "this element" it is basically the same as saying "this atom" or "This type of atom"  So C is right.

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

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b.a device that inputs heat into a cool object