Q57P - 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 = 33 (b) Z = 20 (c) Z = 35 (d) Z = 19 (e) Z = 13

Step-by-Step Solution

Answer

(a) The name, atomic symbol, and group number of the element with Z = 33 are arsenic, As and Group $5A\left(15\right)$respectively. It is classified as a metalloid.

(b) The name, atomic symbol, and group number of the element with Z = 20 are calcium, Ca and Group $2A\left(2\right)$respectively. It is classified as metal.

(c) The name, atomic symbol, and group number of the element with Z = 35 are bromine, Brand Group $7A\left(17\right)$respectively. It is classified as a nonmetal.

(d) The name, atomic symbol, and group number of the element with Z = 19 are potassium, Kand Group $1A\left(1\right)$respectively. It is classified as metal.

(e) The name, atomic symbol, and group number of the element with Z = 13 are aluminium, Al and Group $3A\left(13\right)$respectively. It is classified as metal.

Step1: Determine the respective element with Z = 33 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, 33 is found in Period 4 and Group $5A\left(15\right)$. This atomic number corresponds to the arsenic element with the atomic symbol. It is classified as a metalloid.

Step 2: Find the respective element with Z = 20 on the modern periodic table

The atomic number, 20 is found in Period 4 and Group  $2A\left(2\right)$ of the modern periodic table that element is named calcium with the atomic symbol, Ca. It is classified as metal.

Step 3: Find the respective element with Z = 35 on the modern periodic table

The given atomic number is 35 which belongs to Period 4 and Group $7A\left(17\right)$of the modern periodic table. The atomic symbol written in the box is Br. The name of this element is bromine. It is classified as a nonmetal.

Step 4: Find the respective element with Z = 19 on the modern periodic table

Using the modern periodic table, the atomic number, 19 is found in Period 4 and Group $1A\left(1\right)$. The atomic symbol in the box is K and its name is potassium. It is classified as metal.

Step 5: Find the respective element with Z = 13 on the modern periodic table

Using the modern periodic table, the atomic number, 13 is found in Period 3 and Group $3A\left(13\right)$. The name of the element is aluminium and its atomic symbol is Al. It is classified as metal.