Question

In modern periodic table, $Hf$ is an alphabetical symbol for?
A. Hafnium
B. Hassium
C. Helium
D. Hafnium

Answer 1

In the modern periodic table all the elements are present with their respective symbols. So find the element with the alphabetical symbol $Hf$ in the modern periodic table and then try to find out the name from the same table which is present under the alphabetical symbol.

Complete step by step answer:
In the modern periodic table the alphabetical symbol $Hf$ is found in the position of group number 4 and the period number 6 which is a transition metal and the name of this alphabetical symbol found from the modern periodic table is Hafnium. Hafnium is a chemical element with a symbol of $Hf$
Hafnium is named after Hafnia, this is the Latin name for Copenhagen (it is the place where the element has been discovered). This is a transition metal. The atomic number of the Hafnium is 72. Hafnium is a lustrous, silvery gray and tetravalent transition metal. It chemically resembles zirconium and is found in many zirconium minerals. Hafnium belongs to d-block elements whose properties are in between s and p block elements and so these are called transition elements.

Hence option (A) is the correct answer.

Note: The elements which are having partially filled d-orbital are known as transition elements. An element that has capability to form stable cations with an incompletely filled d-orbital is the definition given by IUPAC. These elements are good conductors of heat and electricity and have high melting points and high density. They are usually hard and tough.