A solid has a structure in which, atoms of $ W,O $ and $Na$ are located respectively at the comers, centre of edges and at the centre of the cubic lattice. The compound is
- $ NaWO_2 $
- $ NaWO_3 $
- $ Na_2WO_3 $
- $ NaWO_4 $
The Correct Option is B
Solution and Explanation
$ = 8 \times \frac{1}{8} = 1$
Number of $O$ atoms present at the centre of edges
$ = 12 \times \frac{1}{4} = 3$
Number of $Na$ atoms present at the centre of cube $= 1$
$\therefore$ Formula of cube $= WO_3Na$ or $NaWO_3$
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Concepts Used:
Solid State
Solids are substances that are featured by a definite shape, volume, and high density. In the solid-state, the composed particles are arranged in several manners. Solid-state, in simple terms, means "no moving parts." Thus solid-state electronic devices are the ones inclusive of solid components that don’t change their position. Solid is a state of matter where the composed particles are arranged close to each other. The composed particles can be either atoms, molecules, or ions.
Types of Solids:
Based on the nature of the order that is present in the arrangement of their constituent particles solids can be divided into two types;
- Amorphous solids behave the same as super cool liquids due to the arrangement of constituent particles in short-range order. They are isotropic and have a broad melting point (range is about greater than 5°C).
- Crystalline solids have a fixed shape and the constituent particles are arranged in a long-range order.