The table lists the distances of some of the nearest stars. Some Nearby Stars
Star
Distance from the Sun
(light-years)
4.2
Proxima Centauri
6.0
Barnard's Star
7.7
Wolf 359
8.6
Sirius A
10.4
Ross 248
Based on the table, a student used a measuring tape to model the distances between the sun
and these nearby stars. The sun was at the starting point. Proxima Centauri was at the 10 m
mark
Which star was closest to the 20 m mark in this model?

The answer is c - the principal of original lateral continuity. 

Electron equations of the given changes are as follow,a)                              cu      →      cu⁺²  + 2e⁻b)                              mg⁺²  +  2 e⁻      →      mgc)                              cl⁻    →      cl  +  1e⁻d)                              s  +  2 e⁻    →      s²⁻e)                                o²⁻      →      o  +  2 e⁻f)                              p  +  3 e⁻    →      p³⁻g)                              fe²⁺    →      fe³⁺  + 1 e⁻h)                              s²⁻    →      s⁴⁺  +  6 e⁻