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.
Many chiropractors also devote considerable time to marketingâin part to pay back the cost of chiropractic school, usually well over $100,000. Yet according to payscale.com, as of Oct. 25, 2008, the average salary of a chiropractor with five to nine years of experience is $61,542.