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Download 8.1 Atoms and Their Parts Assignment
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Assignment #8.1 Atoms and Their Parts Name: ______________________________________________________ Period: ________ Atoms and Their Parts Protons, Neutrons, Electrons Substances that contain only one kind of atom are called elements. Some familiar elements are oxygen, gold, silver, and helium. An atom is the smallest part of an element that can be broken down and still have the characteristics of that element. All atoms have the same basic structure. All atoms have three main parts. Protons A proton is positively charged and is located in the center or nucleus of the atom. Protons have a mass of 1. All atoms of the same element have the same number of protons. The number of protons in the nucleus is call the atomic number and tells you what the element is. A different number of protons would mean you have a different element. The elements are arranged by number of protons in the PERIODIC TABLE. Electrons Electrons are negatively charged and are located in shells or orbits spinning around the nucleus. The number of protons and electrons are usually equal. This equality is important so that the atom as a whole is neither positively nor negatively charged. It is said to be neutral. Electrons have nearly 0 mass. Electrons orbit in specific locations starting closest to the nucleus. Two electrons fit in the first orbit, or shell. Eight fit in the next biggest shell and eight fit in the third shell. Neutrons The third part of an atom is the neutron. Neutrons are neither positive nor negative and are located in the center of the nucleus of an atom along with the protons. Protons and neutrons are the massive parts of an atom. The mass of a neutron is 1. Atomic Weight/Mass Number An atom’s mass comes from adding the mass of the protons and the neutrons. Electrons do not count because they have extremely small mass. Fill out the table below to help you understand the basics about protons, electrons, and neutrons. Subatomic Particle Mass Yes No Charge Positive Negative Where Found Neutral Inside Nucleus Outside Nucleus Proton Electron Neutron Before turning in this assignment, fill in any applicable parts of your Essential Facts for Unit 8. Assignment #8.1 Atoms and Their Parts Study the atomic models and answer the questions below each one. Use your periodic table to identify the elements. Legend: Proton Neutron Electron Protons _____ Neutrons _____ Electrons _____ Atomic Mass _____ Atomic Number _____ Element Symbol _____ Element Name ______________________ Protons _____ Neutrons _____ Electrons _____ Atomic Mass _____ Atomic Number _____ Element Symbol _____ Element Name ______________________ Protons _____ Neutrons _____ Electrons _____ Atomic Mass _____ Atomic Number _____ Element Symbol _____ Element Name ______________________ Protons _____ Neutrons _____ Electrons _____ Atomic Mass _____ Atomic Number _____ Element Symbol _____ Element Name ______________________ Draw a model of the atoms of the elements listed below (Draw protons and neutrons and shade in the electrons). Use your periodic table. 1) Helium 2) Boron Before turning in this assignment, fill in any applicable parts of your Essential Facts for Unit 8.
