This is not an redox reaction because the oxidation number of Oxygen atom is not changing.
Answer:
what you are putting on the concrete and how thick the concrete is.
Explanation:
If you want to but a house on a slab of concrete for a base, you will probably need a little more than you would for a sidewalk. If it is thicker, you will be able to hold more on it than you would if you spread it out thinly.
In the question, the number of atoms per unit cell is required for:
A) Polonium (Po)
In polonium, the structure is simple cubic, meaning there are 8 corner atoms, which add up to one atom per unit cell.
B) Manganese (Mn)
The structure of the Mn can be considered to be a body centered cubic (BCC) and the number of atoms for this is 8 corner atoms and 1 central atoms, making a total of 2 atoms per unit cell.
C) Silver (Ag)
Silver has a face centered cubic (FCC) unit cell structure, where there are 8 corner atoms and 6 atoms on the faces, so there are a total of 4 atoms per unit cell.