Covalent bonds form when electrons are shared between atoms and are attracted by the nuclei of both atoms. In pure covalent bonds, the electrons are shared equally. In polar covalent bonds, the electrons are shared unequally, as one atom exerts a stronger force of attraction on the electrons than the other.
1 is idk
2 is solvent
3 is gamma rays
4 is transmutation
5 is nuclear fission
6 is nuclear fusion
7 is tracer
8 is half life
9 is
10 is strong force
11 is radioactivity
12 is dissociation
13 is unsaturated solution
14 idk
16 is alpha particle
17 is radioactivity
18 is concentration
19 is solubility
20 is saturated solution
21 is dissociation
22 is saturated solution
23 is saturated solution
24 is idk
25 is electrolytes
26 is idk
27 is non electrolytes
28 is concentration
29 is dissociation
30 is idk

Actually Welcome to the Concept of the Waves.
Wavelength is the distance between two consecutive crest or trough.
hence, here the distance is 10cm
So the wavelength is 10cm
===> 10 cm