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Atoms, Elements, Molecules, and Compounds

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by Eli Handwerk on 19 November 2012

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Transcript of Atoms, Elements, Molecules, and Compounds

What is an Element? Stereotypical atom Let's get started with atoms! This stereotypical atom is a common symbol representing science and atoms alike. Even though it is inaccurate,it is commonly used for... Unrealistic atom Energy Levels These are energy levels. Each energy level can hold a certain amount of electrons. Each atom has a certain amount of energy levels. Elements We previously discussed molecules. But have you considered that molecules ARE elements? If you did, you were right! An element is a pure substance that is composed of a SINGLE MOLECULE. Elements are listed on the periodic table, and can be combined to create other substances; COMPOUNDS Molecules Atoms and Compounds! Realistic atom Atoms are portrayed in a common way. But, this way isn't factual! As I divulge in the information, you will hopefully be able to understand the realistic atom, along with the concepts of elements, molecules, an compounds and JIMMY NEUTRON IDEAS Organization Emblems Elements The REAL Atom A correct atom is seldom used for public things. As you could tell, the unrealistic atom consisted of multiple rings around the center. That center is called the nucleus. The nucleus consists of the protons and neutrons of the atom. Protons have a positive charge, whereas neutrons have no charge. The number of protons in the nucleus determine what element it is. You may also have noticed on the unrealistic atom that it has little circles on the rings around the nucleus. These circles are electrons. Electrons have a negative charge, and run around the nucleus at extreme speeds. While these diagrams do include this, there is one thing that sets them apart. On a real atom, there are no rings, and the electrons just run around like crazy on things called ENERGY LEVELS. E=8 E=6 E=2 E=10 As one can tell, these rings have each numbers. These numbers indicate the amount of electrons that can fit on the level. This is the symbol of the element. All elements are categorized and represented on the PERIODIC TABLE. This is hydrogen This is the element's atomic number. This number represents the number of protons in the element's nucleus. Elements are ordered on the periodic table numerically by their atomic number. This is the element's atomic mass. Atomic mass is the mass of the atom in the element. This means an element is not created, but is the creator of different compounds that make up everything. Molecules When multiple atoms bond, they create a molecule. Molecules are also the building blocks of life, just like cells. You can think of atoms as the building blocks for the building blocks of life! FYI Molecules can be either ELEMENTS or COMPOUNDS! A molecule is an element when it is pure and composed of the same types of atom. Molecules are compounds when they are composed of different atoms. The atoms have to react together to form the compound, and each compound has it's own name. Compounds Another type of molecule is a COMPOUND. A compound molecule is a molecule that is composed of different elements. Since compounds are composed of multiple elements, they are not represented by just one elemental symbol. Elements interact to create a compound molecule when two or more elements join together. When they bond, they share electrons but keep their nuclei. Let’s say six carbon atoms combine with twelve hydrogen atoms and then six more oxygen atoms. When they combine, the final product is a single glucose molecule. That is why molecules are written as the elemental symbols of the elements they consist of, and the amount of those elements. For example, let’s use glucose. We said that it consisted of six carbon atoms, twelve hydrogen atoms, and six more oxygen atoms. Judging by this, we can tell decipher that you would write glucose as C6H12O6. But how do the interactions work? As I described earlier, two atoms will combine by sharing electrons. These molecules can sometimes be shown as a “ball-and-stick” model, or can be shown as just a “multi-ball” model. If there is enough quantity of different elements in the molecule, it is a compound molecule. ANY QUESTIONS? That is all! I HOPE YOU ENJOYED THIS PRESENTATION! http://www.ptable.com/Images/periodic%20table.png
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