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Energy Transfer & Conservation Name_____________________________________________ 7.P.2A.1 Develop and use simple atomic models to illustrate the components of elements (including the relative position and charge of protons, neutrons, and electrons). 1. Name the subatomic particles atoms are made of that affect the properties of an atom. Protons, Neutrons, Electrons Atoms 2. What is an atom? Smallest part of an element that has the chemical properties of the element; too small to be seen with a compound microscope 3. Atoms have mass and take up space (volume). Subatomic Particles Proton Charge Positive (+) Electron Negative (-) Neutron No Charge (Neutral; 0) 3. Protons and Neutrons have about the same mass. 4. Protons and neutrons are tightly bound in a tiny nucleus. Atom Structure 5. How are atoms structured? The nucleus is located in the center of the atom with the electrons moving in random patterns in the space around the nucleus. 6. Draw an example of an atomic model for an element below. 7. History of Atomic Models Democritus Dalton initiated term theorized that “atoms” and atoms are too stated that small to be atoms could seen with eye, not be are made up of divided. only 1kind of atom (Atomic Theory of Matter) Thompson used cathode ray to detect electrons and theorized that electrons were embedded in nuclei of atoms (chocolate chip model) Rutherford utilized gold foil experiment involving alpha particles; theorized that atoms had a dense core which was a positive nucleus Chadwick named neutrons Bohr theorized that electrons were orbiting the nucleus 8. How many electrons can occupy each shell or energy level? 1st – 2 electrons; 2nd – 8 electrons; 3rd – 18 electrons; 4th – 32 electrons; 5th – 50 electrons; 6th – 72 electrons; nth – 2(n)2 Energy Transfer & Conservation Name_____________________________________________ 7.P.2A.1 Develop and use simple atomic models to illustrate the components of elements (including the relative position and charge of protons, neutrons, and electrons). 1. Name the subatomic particles atoms are made of that affect the properties of an atom. Atoms 2. What is an atom? 3. Atoms have _____________________ and _____________________. Subatomic Particles Proton Charge Neutron Negative (-) 3. _____________________ and _____________________ have about the same mass. 4. Protons and neutrons are tightly bound in a tiny _____________________. 5. How are atoms structured? 6. Draw an example of an atomic model for an element below. 7.History of Atomic Models Dalton initiated term theorized that “atoms” and atoms are too stated that _________to atoms could be seen with not be eye, are made _________. up of only 1kind of atom (_________ Theory of _________) used cathode ray to detect _________ and theorized that electrons were embedded in nuclei of atoms (chocolate chip model) Rutherford utilized gold foil experiment involving _________ particles; theorized that atoms had a dense core which was a positive nucleus 8. How many electrons can occupy each shell or energy level? named ________ Bohr theorized that electrons were orbiting the _________