Cr+3 has the same electron configuration as which neutral atom?

Scandium (Sc)

Explanation:

Cr³⁺ is a chromium atom that has lost 3 electrons. A chemical specie becomes positively charged when the number of electrons is lower than the number of protons.

 In this regard, the number of protons is more.

Chromium originally has 24 electrons, on losing 3 electrons it will now have 21 electrons.

The atom with 21 electrons in its neutral state is scandium

lol for the pointsss

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.