atomic structure
TRANSCRIPT
1. All substances are made from atoms. 2. There are about 100 different types of
atoms3. An element is a substance which
contains only one type of atom
AtomsAtomsAtomsAtoms
Atoms
The Periodic TableThe Periodic TableThe Periodic TableThe Periodic Table
The Periodic Table
Element, Compound, MixtureElement, Compound, MixtureElement, Compound, MixtureElement, Compound, Mixture
Element, Compound, Mixture
1. Atoms have a small central nucleus containing protons and neutrons
2. Electrons orbit the nucleus3. Protons, neutrons and electrons have
different masses and charges
Structure of an AtomStructure of an AtomStructure of an AtomStructure of an Atom
Structure of an Atoms
Atomic structureAtomic structureAtomic structureAtomic structure
Atomic Structure
Atomic structureAtomic structureAtomic structureAtomic structure
Atomic Structure
1. The atomic number is the number of protons in the nucleus
2. In an atom, the number of electrons always equals the number of protons
3. Atoms do not have an overall electrical charge
Atomic numberAtomic numberAtomic numberAtomic number
Atomic Number
Atomic numberAtomic numberAtomic numberAtomic number
Atomic Number
1. The mass number is the total number of protons and neutrons in an atom
2. The number of neutrons can be calculated by subtracting the atomic number from the mass number
Mass numberMass numberMass numberMass number
Mass Number
Mass numberMass numberMass numberMass number
Mass Number
CalculationsCalculationsCalculationsCalculations
Calculations
1. Isotopes are atoms of the same element that have different numbers of neutrons (e.g. carbon-12 and carbon-14)
2. Isotopes have the same atomic number but different mass numbers
IsotopesIsotopesIsotopesIsotopes
Isotopes
IsotopesIsotopesIsotopesIsotopes
Isotopes
1. Each electron in an atom is at a particular energy level (or shell)
2. Electrons fill the lowest energy levels first (nearest to the nucleus)
3. The first shell can take a maximum of 2 electrons, the second shell can take 8, and the third shell can take 8
ElectronsElectronsElectronsElectrons
Electrons
Electron ShellsElectron ShellsElectron ShellsElectron Shells
Electron shells
Electron arrangementsElectron arrangementsElectron arrangementsElectron arrangements
Electron arrangements
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