For atoms, bonding is crucial. However, different atoms bond in different ways. Form a bond called a chemical bond. Atoms can bond together in two main ways to form larger molecules: covalent bonds and ionic bonds. We also discovered biological molecules such as carbohydrates, lipids, proteins and nucleic acids. Finally, we discovered prokaryotic and eukaryotic cells. Activities related to this unit are iconic and covalent bonds, bonding bases, prokaryotic and eukaryotic cells, biological molecules and biochemical reactions. In the chemical bond, 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 constitute the nucleus of the atom with protons. An electron is a charge (-). Electrons move 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 (NaCI). The overall charge of the ion is positive due to an excess of positive nuclear charge. In iconic bonds, electrons from a metal are transferred to electrons from a nonmetal. Since electrons are negatively charged, when they give up an electron, it will become less negative. The atom that loses the electron is usually a metal. The atom that usually gains the electron is a non-metal....... middle of paper...... to the naked eye have one or more eukaryotic cells. For example, some eukaryotes are animals and plants. Most plants and animals are the reason they are classified as multicellular. Most eukaryotic cells have organelles, including mitochondria, Golgi bodies, lysosomes, endoplasmic reticulum, and vesicles. In conclusion, our activities have provided evidence of how atoms make up the smallest unit of an element and bond together to make 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 and sulfur. Two types of bonds hold atoms together: iconic and covalent bonds. Ionic bonds are attractions between ions of opposite charges. Covalent bonds involve two atoms sharing electrons with each other. Therefore, atoms bond together to make up cells