Answer :
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule. The electrons are represented by dot.
The given molecule is, perbromate ion.
Bromine has '7' valence electrons and oxygen has '6' valence electron.
Therefore, the total number of valence electrons in perbromate ion, 
= 7 + 4(6) + 1 = 32
According to Lewis-dot structure, there are 14 number of bonding electrons and 18 number of non-bonding electrons.
Formula for formal charge :
The Lewis-dot structure of perbromate ion is shown below.
Answer:
A physicist
Explanation:
A physicist is one who deals with matter energy and how they are related
Answer is both (b) and (d).
<em>Explanation;</em>
Equilibrium constant is written as a ratio between concentrations of products and reactants.
The equilibrium reaction is
A(g) ⇄ B(g)
Hence, the equilibrium constant can be expressed as
K = [B(g)] / [A(g)]
If there is more B, then A should be less. Hence, K value would be more than 1.
Hence, according to the given choices, K = 4000 and K = 1 x 10⁶ can be taken as correct answers.
chemical gradient is
defined as the a gradient appearance by the dissimilarity in concentration of a
certain type of solute in an universal solvent take examples like salt in water.
<span> electrical gradient is defined as the disparity between the electrical potential of
a given solute in an universal solvent. fundamentally, if the chemical that
establishes the chemical gradient is electrically charged. Then the diversity
in the charge over the barrier will produce an electrical gradient</span>
<span>hope it helps</span>
