Answer : The correct option is, (a) the energy level.
Explanation :
As we know that there are four quantum numbers :
- Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....
- Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...
- Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from . When l = 2, the value of will be -2, -1, 0, +1, +2.
- Spin Quantum number : It describes the direction of electron spin. This is represented as The value of this is for upward spin and for downward spin.
The first electron configuration quantum number describes the electron shell or the energy level of an atom. The value of 'n' ranges from 1 to the shell containing the outermost electron of that atom.
For example :
For :
(Because it is in 1st shell)
(Because it is in 's' orbital)
(Because l = 0)
(Because of the sign convention)
Hence, the correct option is, (a) the energy level.
"<span>Cohesion" is the property of water molecules that leads to high surface tension.
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Surface tension is defined as the energy or the work required to increase the surface area of a liquid as a result of intermolecular forces.
In water molecules, the hydrogen ends, which are positive compared to oxygen ends, cause the water molecules to stick together, thus, increasing its surface tension.
Answer:
There is one single covalent bond between two carbon atoms.
Explanation:
We know that sharing of electrons form covalent bonds.
If we look upon K,L,M ,N shells of the carbon and hydrogen atoms.
We found that Hydrogen is having only electron in K shell.
And Carbon on the other hand is having electrons in K shell and electrons in L shell.
So carbon have valence electrons,and it can share bonds with any relevant atom to complete its octet.
And Hydrogen requires electron to complete its doublet.
Alkane general formula
For ethane
Carbon atom is shared by Hydrogen.
The remaining one electron of carbon will be shared with another carbon atom.
An image of the sharing of electrons attached below,
Hence we have only covalent bond between the two.
Answer:
B
Explanation:
<em>Both plain and plateau have flat surfaces. However, a plain is located in a low-lying area while a plateau is located on an elevated area. In essence, a plateau can be viewed as an elevated plain or a plain that is bordered by cliffs.</em>
The correct option is B.
Attraction between a cation in one element and an anion in the other element