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Published byAlbert Gordon
Modified over 5 years ago
Structure of the Atom
Bohr- Rutherford Model of Atom
Subatomic ParticleLocationChargeMass Proton NucleusPositive (+)Heavy Neutron NucleusNeutral (0)Heavy Electron Electron Orbit Negative (-)Almost no mass
# of electrons = # of protons – Make the atom neutral Electron shells (orbits) hold only a certain # of electrons: – 1 st shell: 2 electrons – 2 nd shell: 8 electrons – 3 rd shell: 8 electrons
Where do we find this information? Atomic Number: refers to the # of protons in an atom’s nucleus Standard Atomic Notation
Learning Check What is the atomic number for… – Mg – N – Ge – I How many protons does each atom have? – Cu – Li
Learning Check What is the atomic number for… – Mg 12 – N7 – Ge32 – I53 How many protons does each atom have? – Cu29 – Li3
Mass Number: refers to the number of protons and neutrons in an atom’s nucleus Atomic Mass: the mass of an atom in atomic mass units (u) How many NEUTRONS are in a K atom?
Mass Number: refers to the number of protons and neutrons in an atom’s nucleus How many NEUTRONS are in a K atom? Mass # - Atomic # = 39-19 = 20 Neutrons
Isotopes Has a different # of neutrons for the element’s atom but the # of protons remains the same
** We use the atomic mass (rounded to nearest whole #) as the mass number We use this to figure out the number of neutrons in an atom.
Element Name Atomic Number Mass Number Standard Atomic Notation Number of Protons Number of Electrons Number of Neutrons Aluminum1327 13 14 Al Show me what you understand…….
Element Name Atomic Number Mass Number Standard Atomic Notation Number of Protons Number of Electrons Number of Neutrons Aluminum1327 13 14 Al
Atomic Models Bohr Model Cloud Model.
Subatomic Particles and Isotopes. Subatomic Particles Protons- Positively Charged Protons- Positively Charged Located in the nucleus Located in the nucleus.
Bohr model Energy level (shell) Valence electrons
Explaining the Periodic Table (6.7) If elements are the building blocks of all other matter, what are they made of? There are three particles that make.
Atoms. Particles of an Atom Atom: smallest amount of an element ParticleRelative Mass ChargeLocationOther Info Proton nucleusIdentifies the element.
Bohr Models are NOT Boring!
Matter & The Atom. Matter The term matter describes all of the physical substances around us Matter is anything that has mass and takes up space The Universe.
Atom Practical Review. Name the subatomic particles? Protons, Neutron, and Electrons.
The Atom and Its Parts Physical Science. The three subatomic particles are: Proton – Positive charge Electron – Negative charge Neutron – No charge.
Structure of the Atom. Chemical symbol- an abbreviated way to write the name of an element. Chemical symbol- an abbreviated way to write the name of an.
+ Protons and Electrons 8.5B: The student is expected to identify that protons determine an element’s identity and valence electrons determine its chemical.
Bohr Diagrams. # protons = Bohr Diagrams # protons = atomic number.
Protons - positive charge Neutrons - no charge Nucleus - Electrons negative charge 1st energy level holds a maximum of 2 electrons (e 1-
Anatomy of the Atom. Subatomic Particles In each atom there are three subatomic particles: ParticleLocationChargeSize/MassSymbol Proton Inside the nucleus.
Bohr – Rutherford Atomic Model:
Determining the NUMBER of Protons Electrons and Neutrons in Atoms, Ions, and Isotopes.
Atoms Is made Up of 2 Parts: The Nucleus: 1. Protons 2. Neutrons The Rings: 1. Electrons.
The Structure of the Atom. Subatomic particles Subatomic particles are particles that are smaller than an atom Rutherford had predicted three subatomic.
5.2 The Structure of the Atom
Atoms and the Periodic Table L.E.Q. What is matter?
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