periodic table

Examples of periodic table in the following topics:

• The Periodic Table of Elements

  • The periodic table is a tabular display of the chemical elements.
  • Agroup, or family, is a vertical column in the periodic table.
  • A period is a horizontal row in the periodic table.
  • Here is the complete periodic table with atomic numbers, groups, and periods.
  • Explain how properties of elements vary within groups and across periods in the periodic table

• The Periodic Table

  • The rows of the table are called periods.
  • Isotopes are never separated in the periodic table.
  • The standard form of the periodic table, where the colors represent different categories of elements
  • Mendeleev's 1869 periodic table presents the periods vertically and the groups horizontally.
  • Dmitri Mendeleev is known for publishing a widely recognized periodic table.

• Multielectron Atoms

  • Hydrogen is the only atom in the periodic table that has one electron in the orbitals under ground state.

• Electron Configurations

  • Knowledge of the electron configuration of different atoms is useful in understanding the structure of the periodic table of elements.

• A single electron in a central field

  • Let's first treat the case of a single electron in a central field.Although in principle this approximation will only apply accurately to hydrogen, it is extremely powerful (it explains the periodic table for example).

• Translational Equilibrium

  • A book resting on a table is pushing down on the table with the force of its weight .
  • The table, in turn, is pushing back on the book, keeping the book from falling through the table.
  • Since neither the table nor the book are moving, this is an example of static equilibrium.
  • The force of gravity on the book is perfectly counteracted by the force of the table pushing on it.
  • The four forces of the table leg counteract the force of the table and the object pushing on them.

• A Practical Aside - Orders of Magnitude

  • A glance at the following table shows that some of the physical constants are easier to remember than others, but one can exploit the relationships between them a remember only a few key numbers to obtain the the rest.

• Defining Graviational Potential Energy

  • What is the gravitational potential energy of a 1kg block on top of a 1m high table?
  • Consider a book placed on top of a table.
  • As the book is raised from the floor to the table, some external force works against the gravitational force.
  • Thus, if the book falls off the table, this potential energy goes to accelerate the mass of the book and is converted into kinetic energy.
  • Thus, a book lying on a table has less gravitational potential energy than the same book on top of a taller cupboard, and less gravitational potential energy than a heavier book lying on the same table.

• Period and Frequency

  • The period is the duration of one cycle in a repeating event, while the frequency is the number of cycles per unit time.
  • The period is one 200th of a second, T=1/f=(1/200) s=0.005 s.
  • The usual physics terminology for motion that repeats itself over and over is periodic motion, and the time required for one repetition is called the period, often expressed as the letter T.
  • Note that period and frequency are reciprocals of each other .
  • The SI unit for period is the second.

• The Spectrum

  • The table below gives a few Fourier transforms of common functions.