Q. 4.28 - An Introduction to General, Organic, and Biological Chemistry

Question

Write the names and symbols for the elements with the following atomic numbers: 

a. $1$    b. $11$   c. $19$   d.$82$ 

e. $35$    f. $47$       g. $15$     h. $2$

Step-by-Step Solution

Answer

a) The element and its symbol is Hydrogen and $H$ respectively

b) The element and its symbol is Sodium and $Na$ respectively

c) The element and its symbol is Potassium and $K$ respectively 

d) The element and its symbol is Lead and $Pb$ respectively 

e) The element and its symbol is Bromine and $Br$ respectively 

f) The element and its symbol is Silver and $Ag$ respectively 

g) The element and its symbol is Phosphorus and $P$ respectively 

h) The element and its symbol is Helium and $He$ respectively 

Part (a) Step 1: Given Information

We need to write the names and the symbols of the elements having atomic number $1$

Part (a) Step 2: Explanation

We know that, 

• Atomic no. of Hydrogen is $1$ Which is given atomic no.
• Also, the symbol of Hydrogen is $H$

Therefore, The required element is Hydrogen and its symbol is, $H$

Part (b) Step 1: Given Information

We need to write the names and the symbols of the elements having atomic number $11$

Part (b) Step 2: Explanation

We know that, 

• Atomic no. of Sodium is $11$ Which is given atomic no.
• Also, the symbol of Sodium is $Na$

Therefore, The required element is Sodium and its symbol is, $Na$

Part (c) Step 1: Given Information

We need to write the names and the symbols of the elements having atomic number $19$

Part (c) Step 2: Explanation

We know that, 

• Atomic no. of Potassium is $19$ Which is given atomic no.
• Also, the symbol of Potassium is $K$

Therefore, The required element is Potassium and its symbol is, $K$

Part (d) Step 1: Given Information

We need to write the names and the symbols of the elements having atomic number $82$

Part (d) Step 2: Explanation

We know that, 

• Atomic no. of Lead is $82$ Which is given atomic no.
• Also, the symbol of Lead is $Pb$

Therefore, The required element is Lead and its symbol is, $Pb$

Part (e) Step 1: Given Information

We need to write the names and the symbols of the elements having atomic number $35$

Part (e) Step 2: Explanation

We know that, 

• Atomic no. of Bromine is $35$ Which is given atomic no.
• Also, the symbol of Bromine is $Br$

Therefore, The required element is Bromine and its symbol is, $Br$

Part (f) Step 1: Given Information

We need to write the names and the symbols of the elements having atomic number $47$

Part (f) Step 2: Explanation

We know that, 

• Atomic no. of Silver is $47$ Which is given atomic no.
• Also, the symbol of Silver is $Ag$

Therefore, The required element is Silver and its symbol is, $Ag$

Part (g) Step 1: Given Information

We need to write the names and the symbols of the elements having atomic number $15$

Part (g) Step 2: Explanation

We know that, 

• Atomic no. of Phosphorus is $15$ Which is given atomic no.
• Also, the symbol of Phosphorus is $P$

Therefore, The required element is Phosphorus and its symbol is, $P$

Part (h) Step 1: Given Information

We need to write the names and the symbols of the elements having atomic number $2$

Part (h) Step 2: Explanation

We know that, 

• Atomic no. of Helium is $2$ Which is given atomic no.
• Also, the symbol of Helium is $He$

Therefore, The required element is Helium and its symbol is, $He$