Atoms and Their Parts (Subatomic Particles)

Name Period I sJ Atoms and Their Parts (Subatomic Particles ) 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. With the exception of hydrogen, all the atoms have three main parts. The parts of an atom are protons , electrons, and neutrons. A proton is positively charged and is located in the center or nucleus of the atom. 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 again , is unique to each element . A different number of protons would mean you have a different element . Electrons are negatively charged and are located in shells or orbits spinning around the nucleus. The number of protons and electrons can be equal. This equality is important so that the atom is neither positively nor negatively charged . It is said to be neutral . 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 . Their combined masses are called the atomic mass of an element . Electrons are so light that we say they have essentially no mass. After reading the above, use the table below to help you understand the basics about protons, electrons, and neutrons. Subatomic Particle Mass Yes No Charge Positive Proton Electron X Neutron X Negative Where Found Neutral Inside Nucleus Outside Nucleus X x. X Study the drawings and answer the questions at the bottom of the page. Legend : © Proton Neutron O Atom A Atom B 1. How many protons are in atom A ? How many neutrons are in atom A ? atom B ? atom B ? Ami » 5. How many electrons are in atom A ? What is the atomic mass of atom A ? What is the atomic number of atom A? atom B? atom B? 1 atom B? a& & Electron Identifying Atoms Worksheet: From Elements to Subatomic Particles DIRECTIONS: Determine the requested quantities and info about each atom. 1 Atomic Mass [ p 6 . Protons Atomic Number f3) Neutrons & Element Symbol Electrons "7 Element Name / / Charge +_ Ion : catlott/anion/ no Atomic Mass \ fp Atomic Number _ Neutrons Element Symbol _ j_ Electrons ( Element Name M E) Ion : cation/anion tfcK Charge 7. Protons i mil n *1 n oswa» ! _ ^ . d -C — y —f —^ Atomic Mass { j 8. Protons Atomic Number Neutrons Element Symbol ( Electrons Element Name X Ion : cation/anionlno Charge 7 " h Atomic Mass 9. Protons Number Atomic Neutrons 0 Element Symbol Electrons Element Name Charge Ion : cation/'anioffiTn f T ^ Atomic Structure Worksheet: Atom Properties and Isotopes cu Name: Date: Period : Part 1 : Atom Properties. Fill in the blanks for the elements listed below. Element Element Number of Number of Number of Mass Symbol Protons Neutrons Electrons Number Sodium Na 11 12 Calcium 50 ao Nitrogen n n 11 Atomic Number 23 dsO ' Symbol w/ AN and MN 11 40 40 i Neon * a* Oxygen 23 Copper Fluorine 35 F I3 Aluminum lo 3 14 13 «21 13 Part 2: Isotopes . Fill in the blanks for the elements listed below. Remember not to change atomic number or number of protons for atoms of the same element!! Element Carbon - 12 Carbon- 13 Carbon - 14 - Chlorine 35 Chlorine-37 Argon -36 Number of Protons Number of Neutrons Number of Electrons 6 0» 6 6 7 6 U 8 6 14 17 35 Argon-40 17 20 18 18 20 18 12 Atomic Number Symbol w/ AN and MN 6 6 La. 6 U. 17 Argon -38 Mass Number 17 17 17 18 8 38 18 40 18 3S n