Q. 2.56 P - Chemistry: Molecular Nature Of Matter And Change

Question

Give the name, atomic symbol, and group number of the element with the following Z value, and classify it as a metal, metalloid, or nonmetal:

(a) Z = 32 (b) Z = 15 (c) Z = 2 (d) Z = 3 (e) Z = 42

Step-by-Step Solution

Answer

(a) The name, atomic symbol, and group number of the element with Z = 32 are germanium, Ge and Group $4A\left(14\right)$ respectively. It is classified as a metalloid.

(b) The name, atomic symbol, and group number of the element with Z = 15 are phosphorus, P and Group $5A\left(15\right)$respectively. It is classified as a nonmetal.

(c) The name, atomic symbol, and group number of the element with Z = 2 are helium, He and Group $8A\left(18\right)$respectively. It is classified as a nonmetal.

(d) The name, atomic symbol, and group number of the element with Z = 3 are lithium, Li and Group $1A\left(1\right)$respectively. It is classified as metal.

(e) The name, atomic symbol, and group number of the element with Z = 42 are molybdenum, Mo and Group $6B\left(6\right)$respectively. It is classified as metal.

 

Step1: Find the respective element with Z = 32 on the modern periodic table

In the modern periodic table, each box is reserved for a specific element that includes an atomic symbol, atomic number and atomic mass. The boxes are organized based on increasing atomic numbers, into a rectangular grid of horizontal rows as periods and vertical columns as groups/families. 

Using the modern periodic table, the atomic number, 32 is found in Period 4 and Group $4A\left(14\right)$ that elements named germanium with the atomic symbol, Ge. It is classified as a metalloid.

Step 2: Find the respective element with Z = 15 on the modern periodic table

With the help of the modern periodic table, the atomic number, 15 is found in Period 3 and Group $5A\left(15\right)$that element is named as phosphorus with the atomic symbol, P.It is classified as a nonmetal.

Step 3: Find the respective element with Z = 2 on the modern periodic table

The given atomic number, 2 is found in Period 1 and Group $8A\left(18\right)$of the modern periodic table. The atomic symbol written in the box is He. The name of this element is helium. It is classified as a nonmetal.

Step 4: Find the respective element with Z = 3 on the modern periodic table

Using the modern periodic table, the atomic number, 3 is found in Period 2 and Group $1A\left(1\right)$. The atomic symbol below the atomic number is written as Li and its name is lithium. It is classified as metal.

Step 5: Find the respective element with Z = 42 on the modern periodic table

Using the modern periodic table, the atomic number, 42 is found in Period 5 and Group $6B\left(6\right)$. The name of the element with the atomic symbol, Mo is molybdenum. It is classified as metal.