Which best describes an atom? A. a particle with a single negative charge
B. a particle with a single positive charge
C. the smallest particle that still represents a compound
D. the smallest particle that still represents an element

Passing laws, creating courts, and collecting taxes are examples of

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

What makes water a renewable source