According to the Newland’s law of octaves, how many elements are present in between Potassium and Copper?

Correct option is A

Correct Answer: A 9

Explanation:

According to Newland’s law of octaves, elements are arranged in increasing order of their atomic weights. From Potassium (K, atomic number 19) to Copper (Cu, atomic number 29), there are 9 elements in total when counting the intermediate elements. These elements are:

1. Calcium (Ca)
2. Scandium (Sc)
3. Titanium (Ti)
4. Vanadium (V)
5. Chromium (Cr)
6. Manganese (Mn)
7. Iron (Fe)
8. Cobalt (Co)
9. Nickel (Ni)

These 9 elements are present between Potassium and Copper in the periodic table when following Newland's arrangement by atomic weight.

Information Booster:

• Newland's law of octaves is an early classification system based on the periodicity of chemical properties.
  
•  The repetition of properties every eighth element works only for lighter elements.
  
•  The discovery of more elements and transition metals highlighted the limitations of this law.
  
•  It paved the way for Mendeleev’s more accurate periodic table arrangement.
  
•  The modern periodic table is now based on atomic number rather than atomic weight.