Answer: The chemical formula of this precipitate is 
.
Explanation:
An equation which depicts the chemical reaction of substances in the form of chemical formulas is called a chemical equation.
For example, chemical equation for an aqueous solution of sodium phosphate 
and an aqueous solution of magnesium sulfate 
are mixed, a precipitate forms is as follows.
Here, trimagnesium phosphate is the precipitate. The chemical formula of this precipitate is .
Thus, we can conclude that the chemical formula of this precipitate is .
Max Planck was studying the emission of light by
hot objects. He believed that the hot objects did not emit energy continuously,
as would be expected if it were in the form of waves. Instead he suggested that
the object emits the energy in small, specific amounts called quanta. A quantum
is the minimum quantity of energy that can be lost or gained by an atom. He
proposed the following relationship between a quantum of energy and the
frequency of the radiation: E = hn.
E represents the energy in joules of a quantum of radiation, n<span> is the frequency of the radiation emitted, and
h is a constant known as Planck’s constant. Albert Einstein introduced the idea
that electromagnetic radiation has a dual wave-particle nature. Example: white
light exhibits many wavelike particles, it can also be thought of as a stream
of particles. Each particle of light carries a quantum of energy. He called
these particles photons. A photon is a particle of electromagnetic radiation
having zero rest mass and carrying a quantum of energy.</span>
Answer:
The valence electrons are involved in the chemical bonds.
Explanation:
In chemical bonds, atoms lose, gain or share electrons. The valence electrons (those located in the last energy level) in the chemical bonds are involved. These links are made to comply with the law of the octet (complete 8 electrons in the last energy level), for the chemical stability of the atoms.
