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Download Atoms Notes Matter: anything that has mass and takes up space 3
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Atoms Notes Matter: anything that has mass and takes up space 3 States of Matter solid, liquid, gas Atom: building blocks of matter Protons: • Positively charged particles • Help make up the nucleus of the atom • Equal to the atomic number of the atom • Contribute to the atomic mass • Equal to the number of electrons Neutrons: • Neutral particles; have no electric charge • Help make up the nucleus of the atom • Contribute to the atomic mass Electrons: • Negatively charged particles • Found outside the nucleus of the atom, in the electron orbits/levels • Move so rapidly around the nucleus that they create an electron cloud • Equal to the number of protons • Involved in the formation of chemical bonds Examples: Hydrogen # of Protons _______ # of Neutrons _______ # of Electrons _______ Oxygen # of Protons _______ # of Neutrons _______ # of Electrons _______ Sodium # of Protons _______ # of Neutrons _______ # of Electrons _______ Atomic Model Nucleus-center of the atom, contains protons and neutrons Electron cloud-surrounds the nucleus Atomic number: number of protons Atomic mass: protons and neutrons Atoms Notes Matter: ______________________________________________________________________ 3 States of Matter _____________, ______________, _____________ Atom: _______________________________________________________________________ Protons: • ____________ charged particles • Help make up the ______________ of the atom • Equal to the _________________ • Contribute to the atomic mass • Equal to the number of ______________________ ________________ of the atom Neutrons: • ______________ particles; have ________ electric charge • Help make up the ________________ of the atom • Contribute to the atomic mass Electrons: • __________________ charged particles • Found _____________ the nucleus of the atom, in the electron orbits/levels • Move so rapidly around the nucleus that they create an _____________ ____________ • Equal to the number of ___________________ • Involved in the formation of ____________________ ____________________ Examples: Hydrogen # of Protons _______ # of Neutrons _______ # of Electrons _______ Oxygen # of Protons _______ # of Neutrons _______ # of Electrons _______ Sodium # of Protons _______ # of Neutrons _______ # of Electrons _______ Atomic Model Nucleus-center of the atom, contains ____________ and _____________ Electron cloud-surrounds the __________________ Atomic number: ___________________________ Atomic mass: _____________ + _____________
