The atomic radius of chlorine is 102 pm. Explain why the radius of Cl in the perchlorate anion is 41 pm, whereas the radius of Cl in the chloride anion is 181 pm. Compare both values to the atomic radius.

D. most models represent a real world object in a simpler way

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.

4- c, because all matter stays the same no matter what. it is still there. 5- b, because matter is known as mass. 6-c because, flammability is a chemical property. malleability is changing the shape of an object.

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⁻