Molecules are held together by either covalent bonding or ionic bonding. Several types of non-metal elements exist only as molecules in the environment. For example, hydrogen only exists as hydrogen molecule. A molecule of a compound is made out of two or more elements.
In general, chiropractic services range from approximately $30 to $200 per session. Of course, each type of treatment has a different cost. For example, an initial consultation with a chiropractor may be provided at no charge, while a typical therapy session costs about $65 on average.
Statistics About the Chiropractic Profession. 1  In 2010, the median pay for a chiropractor was $67,200 per year. 2  To become a chiropractor, you must complete a doctoral degree. 3  In 2010, there were almost 53,000 jobs for chiropractors.  The field is growing nearly 28% each 1  year. By 2020, almost 15,000 jobs will be added.