The first one
A gas stove burner
The element you are looking for is Scandium, the 4th element in the third group.
In the simple cubic
unit cell, the centers of <span>eight identical particles identical particles define the corners of a cube. T</span><span>he particles do touch along the cube's edges, but do not touch along the cube's </span>diagonally or through the center. There is/are eight particle (one atom) per unit cell and the coordination number is six.
There is three types
of cubic cell:<span>
1) simple cubic unit cell.
2) body-centered cubic unit cell.
3) face-centered cubic-unit cell.
The simple cubic unit cell is the
simplest repeating unit in a simple cubic structure, the edge of a
unit cell always connects equivalent points</span> <span>
</span>
Explanation:
Fertilizers are chemically synthesized plant nutrients.
Nitrogen (N), Phosphorus (P) and Potassium (K) are macronutrients and are required in large amounts by plants. So, farmers use fertilizers in order to supply these nutrients. NPK 15:15:15 , NPK 20:20:20, NPK 15:30:15 are examples of fertilizers used to supply N, P, K to crops.