Chemistry, 10.10.2019 14:00, xmanavongrove55

Why does the distance between two nuclei in a covalent bond vary?

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Each atom has a different atomic radius, which is defined as the distance from the nucleus to the outermost electrons.

As the number of electrons increase across the rows, the atomic radius becomes smaller because there is a stronger magnetic pull between the nucleus and the electrons.

Since it is the outermost electrons that engage in bonding, the length of the bond depends on electrons in atom A and atom B coming close enough together that their outermost orbitals overlap.

Think of it this way, if you have a basketball and a tennis ball and touch them together, the distance between their centers could be called the covalent bond length. But if you compare basketball/tennis ball to beach ball/basketball "covalent bond", you can see that the larger the atoms, the longer the distance between their centers, and therefore the longer the bond length.

Hope this helps.

answered: Guest

1.consider the following balanced equation and answer parts a through. show calculations for each part.

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.

explanation:

answered: Guest

Variables,control,conclusion and finally scientific theory

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