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Chemistry 9 Online
OpenStudy (anonymous):

What are two pairs of elements that are not arranged by increasing atomic mass when arranged by increasing atomic number.

OpenStudy (anonymous):

whats the modern atomic law too?

OpenStudy (shreehari499):

Hi! @dahomie ! Modern atomic theory is also called Bohr's Thory. It states that the electrons are arranged in concentric circular orbits around the nucleus.

OpenStudy (shreehari499):

For the first qn, did u mean an example?

OpenStudy (anonymous):

yes I believe the answer is Cobalt and Nickel; Lawrencium and Rutherfordium thx for youre help too @shreehari499 !!!

OpenStudy (shreehari499):

Hmm...yeah..anytime!

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