Oxygen(O)
Explanation:
Oxygen is the most reactive of all the listed elements. One can determine their reactivities based on the electronegativity values.
- Every element combines with one another to attain stability like the noble gases.
- Electronegativity is the relative ease with which the atoms of elements attracts valence electrons in a chemical bond.
- On the pauling's electronegativities table of elements, carbon is 2.5, oxygen 3.5 and Cl is 3.0
- Oxygen will have the highest reactivity and the most tendency to combine with other atoms.
Learn more:
Electronegativity brainly.com/question/11932624
#learnwithBrainly
Dmitri Mendeleev was the creator and therefore organizer of the periodic table.
The rate of reaction refers to how fast or slow a reaction is. The rate of reaction can be increased by;
i) Using finely divided sodium carbonate
ii) Increasing the temperature
<h3>Rate of reaction</h3>
Thee term rate of reaction refers to the pace of a chemical reaction. A reaction could be fast or slow.
To increase the rate of this reaction;
i) The sodium bicarbonate could be used in the finely divided form.
ii) The temperature could be raised.
Learn more about rate of reaction: brainly.com/question/13440548
Answer:
B. II.
Explanation:
The idea of recrystallization works when the solubility of the target substance decreases as the temperature of the solution decreases.
The method of recrystallization involves dissolving the solute in a suitable hot solvent and then allow the solution to cool gradually. The pure solute dissolves in the hot solvent and then separates out of the solution as it is cooled to room temperature.
Hence recrystallization is preferred over solvent extraction when the desired compound is poorly soluble in the solvent pair at low temperatures and greatly soluble in the solvent pair at high temperatures.
