Question

- Parta Explain why atomic radius decreases as you move to the right across a period for main-group elements but not for transition elements Match the words in the left column to the appropriate blanks in the sentences on the right Reset Help proton larger As you move to the right across a row in the periodic table for the main-group elements, the effective nudear charge (Zl) experienced by the electrons in the outermost principal energy level resulting in a stronger attraction between the outermost electrons and the nucleus and this results in a a tomic radi increases constant neutron decreases Across the row of transition elements, the number of electrons in the outermost principal energy level Thighest n value) is nearly constant. As another is added to the nucleus with each successive element, another electron is added, but that electron goes into anches - 1 orbitala core level) The number of outermost electrons stays constant and they experience a roughly constant effective nuclear charge, keeping the radius approximately after the frst couple of elements in the series smaller

Answer 1

In periodic table Left Right effective nuclear charge increases clue to which size decreases. In transition elements, electrons in ns orbital remains same, which is outermost orbital (n-orbital) having nsa (2 electrons ) and electrons are added into (n-1) el orbital. So outermost electrons (ns) experiences almost same nuclear attraction and thus size remains constant. ©nuclear charge increases), and this kesults in a decrease] atomic radii. 6. As another than the one Proton I is added .... radius oppuoximately [constant aftes -- in the series.