Question

In Python write a program that prompts the user for six elements and their atomic numbers and stores them in a list. Each element and weight pair should also be a list. After the values have been entered, print the list as it entered. Then print the first two characters from the element names (the first character capitalized and the second in lower case) along with the atomic number, starting with the element with the lowest atomic number. You must check that the user enters at least two characters for the element name.

Sample dialog:

Enter the element name: Neon

Enter the atomic number: 10

Enter the element name: argon

Enter the atomic number: 18

Enter the element name: lead

Enter the atomic number: 82

Enter the element name: Radon

Enter the atomic number: 86

Enter the element name: Zinc

Enter the atomic number: 30

Enter the element name: Aurum

Enter the atomic number: 79

[['Neon', 10], ['argon', 18], ['lead', 82], ['Radon', 86], ['Zinc', 30], ['Gold', 79]]

Ne 10

Answer 1

Code:

f=[]
for i in range(6):
    x=input('enter an element name:')                                   
    if len(x)<2:                                    #checking the length of the element name
        print('element must contain 2 letters')     #if length is less than 2     
        x=input('enter another element name:')      #we are asking another input
    y=int(input('enter its atomic number:'))
    l=[x,y]
    f.append(l)
print(f)
for i in f:
    s=''
    a=i[0][0].upper()                               #capitalizing the first letter
    b=i[0][1].lower()                               #converting the 2nd letter to lowercase
    s=s+a+b                                       
    i[0]=s                                          #changing the element's name into two letters
d=len(f)
for i in range(d):
    for j in range(0,d-i-1):
        if f[j][1]>f[j+1][1]:                       #sorting the list in the increasing order of atomic name
            f[j][1],f[j+1][1]=f[j+1][1],f[j][1]
print('')
for i in f:
    for j in i:
        print(j,end=' ')                            #printing element & it's atomic number
    print('\n')

  

  
  
      
    Reference:

Output :

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