JCScience.ie
  • Home
    • JC Science Overview
    • Assessment
      • JC Papers
      • CBA 1 - EEI
      • CBA 2 - SSI
      • Assessment Task
    • About
    • Flash-Cards
    • Contact
  • Nature of Science
    • NoS 1
    • NoS 2
    • NoS 3
    • NoS 4
    • NoS 5
    • NoS 6
    • NoS 7
    • NoS 8
    • NoS 9
    • NoS 10
  • Biological World
    • BW 1
    • BW 2
    • BW 3
    • BW 4
    • BW 5
    • BW 6
    • BW 7
    • BW 8
    • BW 9
    • BW 10
  • Earth and Space
    • E&S 1
    • E&S 2
    • E&S 3
    • E&S 4
    • E&S 5
    • E&S 6
    • E&S 7
    • E&S 8
  • Chemical World
    • CW 1
    • CW 2
    • CW 3
    • CW 4
    • CW 5
    • CW 6
    • CW 7
    • CW 8
    • CW 9
    • CW 10
  • Physical World
    • PW 1
    • PW 2
    • PW 3
    • PW 4
    • PW 5
    • PW 6
    • PW 7
    • PW 8
  • Home
    • JC Science Overview
    • Assessment
      • JC Papers
      • CBA 1 - EEI
      • CBA 2 - SSI
      • Assessment Task
    • About
    • Flash-Cards
    • Contact
  • Nature of Science
    • NoS 1
    • NoS 2
    • NoS 3
    • NoS 4
    • NoS 5
    • NoS 6
    • NoS 7
    • NoS 8
    • NoS 9
    • NoS 10
  • Biological World
    • BW 1
    • BW 2
    • BW 3
    • BW 4
    • BW 5
    • BW 6
    • BW 7
    • BW 8
    • BW 9
    • BW 10
  • Earth and Space
    • E&S 1
    • E&S 2
    • E&S 3
    • E&S 4
    • E&S 5
    • E&S 6
    • E&S 7
    • E&S 8
  • Chemical World
    • CW 1
    • CW 2
    • CW 3
    • CW 4
    • CW 5
    • CW 6
    • CW 7
    • CW 8
    • CW 9
    • CW 10
  • Physical World
    • PW 1
    • PW 2
    • PW 3
    • PW 4
    • PW 5
    • PW 6
    • PW 7
    • PW 8

Basic atomic structure


Picture

Picture
The Structure of an Atom
Picture

PictureA model of a Lithium atom
The Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus.

The picture on the left is a model of a Lithium atom which has the atomic number 3. This means that it has 3 protons in its nucleus and also 3 electrons in its orbits. Its Mass number is 7 which means it has 7 protons and neutrons added together. Since it has 3 protons it must therefore have 4 neutrons.


Definitions

An Atom is the smallest part of an element that has the properties of that element.

Atomic Number is the number of protons in in the nucleus of an atom.

Mass Number is the number of protons and neutrons in the nucleus of an atom.

Isotopes - the same element with different number of neutrons.
Powered by Create your own unique website with customizable templates.
  • Home
    • JC Science Overview
    • Assessment
      • JC Papers
      • CBA 1 - EEI
      • CBA 2 - SSI
      • Assessment Task
    • About
    • Flash-Cards
    • Contact
  • Nature of Science
    • NoS 1
    • NoS 2
    • NoS 3
    • NoS 4
    • NoS 5
    • NoS 6
    • NoS 7
    • NoS 8
    • NoS 9
    • NoS 10
  • Biological World
    • BW 1
    • BW 2
    • BW 3
    • BW 4
    • BW 5
    • BW 6
    • BW 7
    • BW 8
    • BW 9
    • BW 10
  • Earth and Space
    • E&S 1
    • E&S 2
    • E&S 3
    • E&S 4
    • E&S 5
    • E&S 6
    • E&S 7
    • E&S 8
  • Chemical World
    • CW 1
    • CW 2
    • CW 3
    • CW 4
    • CW 5
    • CW 6
    • CW 7
    • CW 8
    • CW 9
    • CW 10
  • Physical World
    • PW 1
    • PW 2
    • PW 3
    • PW 4
    • PW 5
    • PW 6
    • PW 7
    • PW 8