2. For each of the six elements aluminium (Al), boron (B), nitrogen (N), oxygen (O) phosphorus (P), sulfur (S), write down: a. the period of the periodic table to which it belongs.
b. its group number in the periodic table.
c. its proton number (atomic number).
d. the number of electrons in one atom.
e. its electronic configuration.
f. the number of outer-shell electrons in one atom.
g. Which of the above elements would you expect to have similar properties?

2. For each of the six elements aluminium (Al), boron (B), nitrogen (N), oxygen (O) phosphorus (P), sulfur (S), write down:

a. the period of the periodic table to which it belongs.

b. its group number in the periodic table.

c. its proton number (atomic number).

d. the number of electrons in one atom.

e. its electronic configuration.

f. the number of outer-shell electrons in one atom.

g. Which of the above elements would you expect to have similar properties?

The answer is for sure D, can't be lack of invention hell one of the first civilizations to have water moving up and down slopes,invasion of another group is what happened(Spanish) and an natural disaster was never talked about in historical context