Answer:
The answer is the third one which is 24 (glucose)
It was the element of aluminium where they predict their properties <span />
Kr= krypton
K= potassium
C=carbon
En= neon
Si= silicon
Au= gold
Ni= nitrogen
Br= berillium
Mg=magnesium
Mn= mangenese
Al: aluminum
C - bc as the water boils the cold water particles melt and become the hot water particles!