The mineral copper (cu) is composed entirely of copper atoms. to which mineral group

The correct answer is native elements.

Explanation:

Rather than the free gases found in the atmosphere of the Earth, some twenty elements are found in nature in a pure or almost in a pure form, which is known as the native elements.  

The native elements are differentiated into three families, that is, semi-metals, metals, and non-metals. The most usual native metals that are featured by basic crystal compositions form the three groups, known as the gold group, comprising silver, gold, lead, and copper.  

Part 1:  0.5 mol

Part 2:  0.25 mol

Explanation:

For both problems, use the equation M = (moles of solute)/(liters of solvent).  

For part one, 1 M = (mol)/(0.5 L) = 0.5 mol.

For part two, 5 M = (mol)/(0.25 L) = 1.25 mol