The Atom. What do you know? Part of AtomLocationMasscharge.

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Presentation transcript:

The Atom

What do you know? Part of AtomLocationMasscharge

How many of each “part” are in these atoms? Fluorine (F) atomic number = 9 & atomic mass = 19 Copper (Cu) atomic number = 29 & mass = 64

Copy this table Part of atomLocationMassCharge ProtonNucleus1Amu+1 NeutronNucleus1Amu0 (neutral) ElectronElectron “Cloud”0 Amu Amu = “Atomic Mass Unit” (not grams)

How many of each “part” are in these atoms? Fluorine (F) atomic number = 9 & atomic mass = 19 Copper (Cu) atomic number = 29 & mass = 64

Structure of the Atom Atomic number = number of protons in the nucleus AND number of electrons outside it Atomic mass = total mass of the protons + the neutrons. It is always a whole number. The number of neutrons = atomic mass – the number of protons.

Answers Fluorine atomic mass = 19 and atomic number is 9 Has 9 protons (+) and 9 electrons (-) Has = 10 neutrons Copper atomic mass = 64 and number = 29 Has 29 protons (+) and 29 electrons (-) Has 64 – 29 = 35 neutrons

Mass of electron How can anything have no mass – So small compared to the rest of the atom it does not count For example – if I pluck one hair out of my head – my mass on my bathroom scale will not change. The hair has mass, but it is so insignificant compared to the rest of me, we call it 0.

Atom locations Nucleus (+) __ Electron Cloud (-)

Nucleus Nucleus is (+) Neutron Proton

Electron shells Electrons are outside the nucleus in an “electron cloud” made of energy levels

Number Element Symbol Atomic MassAtomic Number Protons Neutrons Electrons 1 C 2 Oxygen P 6 Magnesium 7 Mn Fe 13 Sulfur

Number Element Symbol Atomic Mass Atomic Number Protons Neutrons Electrons 1. Sodium Na 2. Potassium P

Isotope Notation Isotope Notation shows the symbol of the element with the atomic mass and atomic number on the left, atomic mass above. Atomic Mass 25 Symbol Mg Atomic Number 12

Atomic Structure using Isotope Notation Atomic Mass 25 Symbol Mg Atomic Number 12 Number of protons = Atomic Number = 12 Number of electrons = number of protons (12) Number of neutrons = Atomic Mass – Atomic Number = 25 – 12 = 13

Practice Cl Cl Protons = 1717 Electrons = 1717 Neutrons = 1820