Other than for the chemical symbol, the electron dot diagram for silicon would be the same as it was for carbon.
The reason for this is because electron dot diagrams are used to represent the electrons in the outermost, or valence, shell of an atom. In a group of the periodic table, all of the elements have the same number of valence shell electrons. This means that all elements belonging to the same group have the same electron dot diagram, except for the symbol of the element that is within the diagram.
Answer:
its false
Explanation:
because if an leaf floats down from a tree it is not considered an object for a free-fall
Answer:
True
Explanation:
When a nuclear power plants ends its operating life, it is necessary to dispose correctly all the radioactive material left from the operations of the power plant.
In fact, apart from the fuel rods (which contain the uranium that is the fuel of the nuclear reactions), other materials of the core (such as the vessel) becomes radioactive due to the prolonged exposure to the products of nuclear reactions in the core.
As a result, all these materials remain radioactive for very long time (hundreds or thousands of years). It is therefore important to dispose them correctly, in proper sealed containers which are able to shield the radiation emitted by these radioactive element (alpha, beta and gamma radiation).
Therefore, "waste from nuclear power plants must be disposed of in radioactively shielded storage containers" is a correct statement.
Sometimes scientists make a mistake or Miscalculate and need to do the experiment again.
When an electron stops, it emits a photon with energy equal to the kinetic energy lost by the electron:
The energy of the photon is
where
is the Planck constant and f is the frequency. Therefore, the maximum frequency of the emitted photon occurs when the loss of kinetic energy is maximum.
The maximum loss of kinetic energy of the electron occurs when the electron stops completely, so it loses all its energy:
Keeping in mind that
, we have
And so, this corresponds to the energy of the emitted photon, E. Therefore, we can find the maximum frequency of the emitted photon:
