Question 34 – The periodic table - Questions

Germanium had not yet been discovered when Mendeleev created his periodic table.

Table 1 shows some of the properties that Mendeleev predicted for this undiscovered element (which he named eka-silicon) alongside the actual properties of germanium.

Table 1

Property	Predicted property (eka-silicon)	Actual property (germanium)
Relative atomic mass	72	72.6
Density in $g/cm3\text{g/cm}^3$	5.5	5.35
Formula of oxide	$EsO2\text{EsO}_2$	$GeO2\text{GeO}_2$
Density of oxide in $g/cm3\text{g/cm}^3$	4.7	4.7

Describe how Mendeleev predicted these properties of germanium before it was discovered.

Germanium had not yet been discovered when Mendeleev created his periodic table.

Table 1 shows some of the properties that Mendeleev predicted for this undiscovered element (which he named eka-silicon) alongside the actual properties of germanium.

Table 1

Property	Predicted property (eka-silicon)	Actual property (germanium)
Relative atomic mass	72	72.6
Density in $g/cm3\text{g/cm}^3$	5.5	5.35
Formula of oxide	$EsO2\text{EsO}_2$	$GeO2\text{GeO}_2$
Density of oxide in $g/cm3\text{g/cm}^3$	4.7	4.7

Describe how Mendeleev predicted these properties of germanium before it was discovered.

The periodic table

Question 28

Table 1

The periodic table

Question 28

Table 1

The periodic table

Question 28

Table 1

The periodic table Questions

The periodic table

Question 28

Table 1

The periodic table Questions