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PAX RN ENTRANCE EXAM QUESTIONS AND ANSWERS 2024
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---8February 20242023/2024A+
- ATOM 
(physics and chemistry) the smallest component of an element having the chemical properties of the element 
 
 
 
MATTER 
Anything that has mass and occupies space. 
 
 
 
 
SUBSTANCE 
Any material all samples of which have the same composition and properties ( a mixture is not a substance) 
 
 
 
ELEMENT 
Identified by its symbol and its atomic number 
 
 
 
ATOMIC NUMBER 
Number of protons in the nucleus of an atom 
 
 
 
MASS NUMBER 
Sum of the number of protons and neutrons in the nucl...
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