Filtration. A filter is a porous barrier. Heterogeneous means it's a visible mixture, i.e large enough particles to see.
Answer:
the attribution of a personal nature or human characteristics to something nonhuman, or the representation of an abstract quality in human form.
Explanation:
7 protons, 7 neutrons, and 7 electrons
Answer:
Argon {Ar}
Explanation:
The noble gas used for a condensed electron configuration is the one before the element which you are configuring.
In this case, the element (Mn) is manganese
The noble gas that is before this element is Argon which is the row above it
so your configuration would be {Ar} 3d^5 4s^2
