Answer:
1. The evidence that chemical reaction has occurred can be found in the change of the reagents present after the reaction, that is formation of glucose in the area where the reaction is taking place
2. The most abundant element of the chemical reaction is oxygen which has a total quantity of 18 atoms in the reaction
3. The oxygen atom has an atomic number of 8 and therefore contains 8 protons and 8 neutrons and (therefore) 8 electrons (to be neutral, electronically)
4. The protons and the neutrons of the atom, oxygen, are located in the nucleus, while the electron are found in the different orbitals surrounding the atom
5. The element, oxygen, symbol, O, belongs to the group 16 of period 2 in the periodic table
Explanation:
the equation for calculating density is m÷v
(B) S
(C) N
(D) Ca
(E) Cl
Answer:
0.25
Explanation:
The correct answer for above statement is:
C. Displacement.
Explanation:
Displacement reaction is a chemical reaction in which a bounteous reactive element replaces a less reactive element from its compound. Both metals and non-metals take part in displacement reactions. Example: Reaction of iron nails with copper sulfate solution.a type of chemical reaction wherever an element counters with a compound and takes the position of another element in that compound.