Answer:
- <em>The inertness of the noble gases is due to </em><u>the fact that their outermost main energy level of electrons (valence shell) is full.</u>
Explanation:
<em>Inertiness of the noble gases</em> refers to their lack of reactivity, i.e. the stability provided by a full valence electron shell.
The noble gases are He, Ne, Ar, Kr, Xe, Rd, and, the most recently discovered, Og.
They are located in the last column (18) of the periodic table.
Then, when you do the electron configuration of the noble gases, you find they have the outermost prinicpal energy level full. These are their electron configurations using the abbreviated form:
Being their valence orbitals full, these elements will not be very likely to exchange or share electrons, which is the reason of their inertness.
This does not mean that they do not react at all. Xe and F (the most reactive nonmetal) form some compounds.
Not accurate. Accuracy does not deal with consistency. Accuracy deals with the difference between a measured value and its actual value.
Answer:
At equal concentration of HBCG and BCG^-, the colour is green. This colour first appears at pH = 3.8
Explanation:
HBCG is an indicator that is prepared by dissolving the solid in ethanol.
Since
Ka=[BCG−][H3O+][HBCG]When [BCG-] = [HBCG], then Ka = [H3O+].
If pH = 3.8
Ka= [H3O+] = -antilog pH = -antilog (3.8)
Ka= 1.58 ×10^-4
Answer:
violet
Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light. Ultraviolet (UV) light—is radiation with a wavelength shorter than that of visible light, but longer than X-rays, in the range 10 nm to 400 .
Explanation:
When battery discharge / delivering current the lead at the anode is oxidized
that is ;
pb---->pb+ 2e-
since the lead ions are in presence of aquous sulfate in insoluble lead sulfate precipitate onto the electrode
the overall reaction at the anode is therefore
Pb + SO4^2- ---> PbSO4 + 2e-
