Question

Mr. Mendeleev found elements known as element X and element Y, he found that element X and element Y are one of the transition element and non-metallic respectively in periodic Table

Identify Element X and Element Y to their groups from Periodic Table.

Using the information from Table 1

i) calculate the mass of atom X assming the number of mole similar with Zinc

ii) calculate the number of atom Y assming the mass of element Y similar with 16. 3 g of sulphur

Table 1

Elements : zinc

Number of moles : 0.365

Mass, g : 23.3

Number of atoms : __

Elements : Sulphur

Number of moles : __

Mass, g : 16.3

Number of atoms : 3.06x10^23

Answer 1

Table 1: Number of atoms: 0.365*6.02*10²³ = 2.197*10²³

Table 2: Number of moles: 3.06/6.02 = 0.508