# Question #1bcba

##### 1 Answer
Dec 21, 2017

Yes , you can predict the element’s reactivity

#### Explanation:

The lower the ionization energy of an element , the easier it can give off its electrons.The ease with which it can give off its electrons it's called electropositivity;the more electropositive an element is the more reactive it gets , so , as the ionization energy of an element gets lower , its reactivity increases.

If you want a numerical value , you can use the Mulliken electronegativity (electronegativity is the opposite of electropositivity) :

$X = \setminus \frac{{E}_{i} + {E}_{e a}}{2}$ , where ${E}_{i}$ is the first ionization energy and ${E}_{e a}$ is the electron affinity.
The measurment unit is $\setminus \frac{k J}{\setminus \textrm{m o \le}}$ or $e V$