Which of these four elements is the most reactive metal? na, rb, al, in

Sodium Na

Explanation:

Sodium is most reactive metal among these.

Sodium is present in group one.

It is alkali metal.

It has only one valence electron.

It need to lose the one valance electron to get the stability.

Sodium atom loses its electron to electronegative atom and get stable.

It loses its electron to halogens atom and form salt.

Na + Cl → NaCl

Its atomic number is 11.

Electronic configuration:

Na₁₁ = 1s² 2s² 2p⁶ 3s¹

we can see that 3s have only one electron which is lost by sodium metal and get stable.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

the answer is b. dilution