Which is the correct lewis structure for carbon tetrabromide (cbr4), in which a central carbon atom is bound to four atoms of the group 7a element bromine?

a.)
b.)
c.)
d.)

Answer : The correct option is, (B)

Explanation :

Lewis-dot structure : It is defined as the it shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

The given molecule is, carbon tetrabromide

As we know that the carbon has '4' valence electrons, bromine has '7' valence electron.

Therefore, the total number of valence electrons in = 4 + 4(7) = 32

According to Lewis-dot structure, there are 8 number of bonding electrons present between the carbon-bromine and 24 number of non-bonding electrons present on the bromine.

Hence, the correct option is, (B)

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter