These would be the elements in row 2 the alkaline metals. Elements in a row usually share many qualities such as electon reactivity as well as similar characteristics like the fact that many alkaline metals are considered Cations, ions with positive charges. Some examples are beryllium and calcium.
As an example I will tell you how to extract DNA from peas
1. Blender insanity
<span>The blender separates the pea cells from each other, so you now have a really thin pea-cell soup
</span>2. Soapy peas
3. Enzyme Power
4. Alcohol Seperation
Producers are primary consumers and it gets 10 %
