Answer:
B
Explanation:
the fluorine has an high tendency to gain electrons from other elements with lower electronegativities
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>
The answer is the second one (B)
According to <span>Le Chatelier's Principle," when a system at equilibrium is subjected to any external stress by changing concentration, pressure or temperature, it will modify itself in such a way so as to minimize the effect of that change made in it".
Change in Concentration:
Suppose following reaction at equilibrium,
A + B </span>⇆ C
When the concentration of reactants (A or B) is increased the equilibrium will shift in forward direction and will produce more product in order to cancel out the effect of extra reactant added. Or, if product (C) is added then it will respond in opposite direction.
Change in Pressure:
Suppose following reaction at equilibrium,
A + B ⇆ C
If pressure is applied on this equilibrium, the equilibrium will shift in forward direction because there is a decrease in volume at product side (1 mole as compare to reactants which are 2 moles). And the opposite case will be observed if the pressure is decreases.
Change in Temperature:
Suppose following reaction at equilibrium,
A + B ⇆ C + Heat
This is an exothermic reaction (heat is evolved) and the heat produced is in the product side. When the temperature is increased the equilibrium will shift in the backward direction. And decrease in temperature will shift the equilibrium in forward direction.