The stability of atoms depends on whether or not their outer-most shell is filled with electrons. If the outer shell is filled, the atom is stable. Atoms with unfilled outer shells are unstable, and will usually form chemical bonds with other atoms to achieve stability.
Why did the narrator use the phrase “fit together like puzzle pieces” to describe how the cells of a developing human embryo form a human face
Consumer is a person who purchases
Producer is someone that makes the things consumers purchase
Bottom to top is: 1. troposphere 2. stratosphere 3. mesosphere 4. thermosphere
