Answer:
linear or trigonal planar
Explanation:
The molecular formula AB have the following criteria:
A= the central atom
B= directly bonded atoms.
In Molecular Geometry, Molecular Formula AB can either be Linear or Trigonal Planar.
In linear geometry, they are formed as a result of Sp hybridised orbital. Sp hybridised orbital involves blending of one s-orbital and one p-orbital to produce a hybrid orbital directed along a straight line, therefore making it linear e.g CO , HCN etc.
In Trigonal Planar, they are formed as a result of Sp hybridised orbital. Sp hybridised orbital are formed by mixing of one s-orbital and two p-orbitals to produce orbitals which are coplanar and the lobes directed towards the corners of an equilateral triangle. (Trigonal Planar) e.g BF , , SO etc.
A—Gold is the answer as it is very soft.
Answer: Option (a) is the correct answer.
Explanation:
Entropy means the degree of randomness present within the molecules of an object.
When a substance is present in a solid state then its molecules are held together because of strong intermolecular forces of attraction.
As a result, molecules are not able to move freely and therefore, there will be no randomness.
But when a substance changes into liquid state then its molecules mover further apart from each other due to gain in kinetic energy. Hence, randomness increases.
On the other hand, when a substance moves from liquid to gaseous state then its molecules gain more kinetic energy due to which there will be high degree of randomness.
Therefore, as the products in the given reaction are present in liquid and gaseous state. So, this means that there has been an increase in entropy.
A decrease in entropy is represented by negative sign and an increase in entropy is represented by a positive sign.
Thus, we can conclude that the sign of for the given reaction is > 0.
The allowable combination for the atomic orbital is n=4, l=2, =2.
<h3>What are the three quantum numbers of an atomic orbital?</h3>
Three quantum numbers specify an atomic orbital:
- The principal quantum number, n, which is a positive integer, describes the relative size of the orbital and its distance from the nucleus.
- l is the angular momentum quantum number that is related to the shape of the orbital; l is an integer from 0 to n-1 (so n limits l ),
- is the magnetic quantum number that prescribes the three-dimensional shape of the orbital around the nucleus; values are integers from -l to =l(l limits ml)
For n = 4, l can four values: 0, 1, 2, and 3. To be consistent with =+2the l value must be higher than 1. There are two l values that are consistent with n and values: l= 2 or 3
Therefore, the allowable condition is n=4, l=2, =2
To know more about quantum numbers, visit: brainly.com/question/16979660
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