How many atoms do elements have?

Answer 1

An element is a description of the properties of any particular atom based on the number of protons it has. An element is not a larger or smaller version of a atom (in the way that protons are smaller components and molecules are larger amalgamations). There are some elemental forms that spread out multiple atoms until arbitrarily capped by impurities like Diamond (which is pure carbon), some which have small groupings that they naturally form like S8 for Sulfur, some which exist in pairs like H2 and N2 for Hydrogen and Nitrogen, but most elements exist on their lonesome or in metallic bonds like Boron and Nickel respectively. The sample size of any of these molecular elemental forms can be as large as desired or as small as one molecule so described.

Answer 2

Elements are single atoms

There are 6,022 x 1023 atoms per mole of whatever element you have.

Answer 3

one