For atoms, bonding is crucial. However, different atoms bond in different ways. Formation of a bond known as a chemical bond. There are two main ways that atoms can bond together to form larger molecules, covalent bonds and ionic bonds. We also learned about biological molecules such as carbohydrates, lipids, proteins, and nucleic acids. Finally, we learned about prokaryotic and eukaryotic cells. Activities related to this unit are Iconic and Covalent Bonds, Bonding Basics, Prokaryotic and Eukaryotic Cells, Biological Molecules and Biochemical Reactions. In chemical bonding there are atoms, protons, neutrons and electrons. Atoms are the simple part of the element and retain its properties. A proton is a positive (+) charge. An atom is determined by the number of protons it has. A neutral atom has an equal number of (+) and (-) charges. Neutrons have a neutral charge (0). They make up the nucleus of the atom with protons. An electron is a charge (-). Electrons travel in orbitals around the nucleus. The first orbit has two electrons, the second orbit has 8 electrons, and the third orbit has sixteen electrons. One type of bond is iconic. Iconic bonds are the attraction of oppositely charged ions. Ions are atoms that have gained or lost an electron to have a positive or negative charge. For example, sodium + chlorine = sodium chloride (NaCl). The overall charge of the ion is positive due to the excess positive nuclear charge. In iconic bonds, electrons from a metal are transferred to electrons from a non-metal. Since electrons are negatively charged, when an electron gives up it will become less negative. The atom that loses the electron is usually a metal. The atom that usually acquires the electron is a non-metal....... middle of paper...... to the naked eye you have one or more eukaryotic cells. For example, some eukaryotes are animals and plants. Most plants and animals are the reason why they are classified as multicellular. Most eukaryotic cells have organelles including mitochondria, Golgi bodies, lysosomes, endoplasmic reticulum, and vesicles. In conclusion, our activities provided evidence of how atoms are the smallest unit of an element and bond together to form molecules. They are composed of protons, electrons and neutrons. The most common elements in the biological molecules that make up organisms are Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulphur. Two types of bonds that hold atoms together are iconic and covalent bonds. Ionic bonds are attractions between ions of opposite charge. Covalent bonds involve two atoms sharing electrons with each other. Therefore, atoms bond to make cells