Yassin E.

asked • 09/25/20

By increasing the atomic number of the transition element in the same period,........

Choice:


By increasing the atomic number of the transition element in the same period,........


a. It's ionization energy decrease.

b. It's atomic radius increases.

c. It's density decrease.

d. It becomes more difficult to be oxidized.



## I need the reason why with the answer##

Omar O.

You in the first transition series the as the atomic number increases the atomic radius decreases until it reaches chromium where it becomes nearly constant . but the mass keeps increasing and as a result the destiny keeps increasing as it equals mass over volume but the ionization energy increases and it becomes more difficult to lose electrons as it requires more energy (i.e. difficult to be oxidized).
Report

02/06/22

1 Expert Answer

By:

Paolo S. answered • 09/25/20

Tutor
5.0 (312)

PhD student with 5+ years of Tutoring and Teaching Chemistry Labs

See tutors like this
See tutors like this

Increasing atomic number along a period means that you are going from left to right on the Periodic Table.

A. Ionization INcreases from left to right as Zeff increases as well.

B. The atomic radius INcreases as Zeff increases as well.

C. Density increases across a period as the volume decreases.

D. It DOES become more difficult to oxidize an atom because you have a high Zeff and the element does not want to lose any e-, so it will have a very high ionization energy,

Upvote • 1 Downvote
More
Report

Yassin E.

Thanks so much but, what zeff means
Report

09/25/20

Paolo S.

Zeff is the effective nuclear charge. It is an expression to explain the pull that electrons "feel" from the nucleus. The bigger the nucleus (higher atomic number) the stronger the pull.
Report

09/25/20

Yassin E.

Thanks
Report

09/25/20

J.R. S.

tutor
Does the atomic radius increase or decrease going from left to right across the table? You mentioned it increases, but I thought it would decrease as Zeff increases due to increased "pull" on the electrons.
Report

09/25/20

Paolo S.

Hi J.R., you’re absolutely right it decreases from left to right as a consequence of Zeff. Btw if anybody is interesting in this contact me, as the there are some peculiarities when you reach the 3rd period down and d-orbitals enter the discussion. Thanks for the catch!
Report

09/25/20

Omar O.

@Paolo S. thanks i got to learn about Zeff thanks to you
Report

02/06/22

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.