# In what type of reaction does a single uncombined element replace another element in a compound?

Apr 23, 2017

Single Replacement.

#### Explanation:

The general formula for a single replacement reaction is

$A + B C = = = = B + A C$

Or $C + A D = = = = = D + A C$

The single element can be either the positive or the negative ion that replaces a less active element.