Answer: An Arrhenius acid is a type of substance yields hydrogen ions, 
, in an aqueous solution.
Explanation:
Substances that give dissociate to give hydrogen ions or protons when dissolved in an aqueous solution are called Arrhenius acid.
For example, HCl is a strong acid and upon dissociation in water it gives the following ions.
Thus, we can conclude that an Arrhenius acid is a type of substance yields hydrogen ions, , in an aqueous solution.
Answer:
During electron capture, an inner electron usually from K shell or L shell combines with proton of the nucleus thereby changing proton to neutron. The process of electron capture is also accompanied by the emission of neutrino. It generally occurs in proton rich nucleus. The capture of electron by the proton creates a hole in the electron shell. The hole created is generally filled by the dropping down of a higher level electron with the emission of X -ray.
According to a source, the options that fits the question is reactants collide with reactants to form activated complex that separates into products. This clearly suggest the collision theory.
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I believe the answer is thermal expansion.
Answer:
Water is polar.
Water is an excellent solvent.
Water has a high heat capacity.
Water has a high heat of vaporization.
Water has cohesive and adhesive properties.
Water is less dense as a solid than as a liquid.
