Question

In the Mendeleev periodic table, gaps were left for the undiscovered elements. Which of the following elements found a place in the periodic table later ?
1. F
2. Mg
3. Ge
4. Ca

Answer 1

Correct Answer - Option 3 : Ge

The correct answer is Ge.

• Germanium (Ge) was discovered later which fit into the empty spaces left by Mendeleev PT and matched to the most properties
• Clemens Winkler discovers Germanium.
• Germanium belongs to Group 14 and Period 4.
• It is a P-Block element, and the atomic number is 32.

ELEMENT	ATOMIC NO.	GROUP	PERIOD
F (Fluorine)	9	17	2
Mg (Magnesium)	12	2	3
Ca (Calcium)	20	2	4

• Germanium was used in transistors and electronics components.
  • Germanium is a semiconductor. The pure element was commonly doped with arsenic, gallium in other elements and used as a transistor in thousands of electronic applications.
• Germanium ores are very rare. They are found in small quantities as the minerals germanite and argyrodite.