The general properties of Group 1 alkali metals are:
1. They form cations.
2. They are highly reactive.
3. They have a charge of +1.
4. They form ionic compounds.
5. When their oxides or hydroxides are reacted in water, they form alkalis i.e. bases.
6. They are usually soft in nature.
7. They have low densities.
They really have distinctive forecasts now and again. For example, valence bond hypothesis predicts no unpaired electrons in sub-atomic oxygen, while sub-atomic orbital hypothesis predicts two unpaired electrons in the 2 π ∗ orbitals.
The Molecular orbital hypothesis can be checked for this situation since sub-atomic oxygen is paramagnetic. VB hypothesis is sensibly great at giving subjective data about the states of particles, yet MO hypothesis gives more data about vitality levels, bond qualities, and so on.
Answer:
Chromium is reduced in forward reaction
Explanation:
A species is said to be oxidized if oxidation number of the species increases.
A species is said to be reduced if oxidation number of the species decreases.
Oxidation number of Cr in = +6
Oxidation number of Cr in = +3
So change in oxidation number of Cr in forward reaction = (+3)-(+6) = -3
Hence oxidation number of Cr decreases on going from to .
So, chromium is reduced in forward reaction.
Energy decreases as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level. Trophic level transfer efficiency (TLTE) measures the amount of energy that is transferred between trophic levels.