Some elements belonging to second period of periodic table, and their

1.	Some elements belonging to second period of periodic table, and their atomic radii are given below.Observe them and write answers.2nd period elements BBeONLiCAtomic radii8811166 7415277(a) Write the elements in the ascending order of their atomic radii. (b) Which of the 2nd period elements closer to the configuration of inert gas ? (c) Which is the outermost orbit of all these elements ? (d) Which elements atomic size bigger Beryllium or Carbon ? Why ?
Answer» (a) The ascending order of atomic sizes is O, N, C, B, Be and Li. (b) Lithium has closest inert gas configuration i.e., 1s² 2s¹.Its nearest inert gas is Helium. (c) The outermost orbit for all these elements is second orbit. (d) Beryllium has more atomic size than Carbon. Because when we move across a period the atomic number increases. So nuclear attraction of outermost orbit increases. So carbon has lesser size than Beryllium.

Some elements belonging to second period of periodic table, and their atomic radii are given below.Observe them and write answers.2nd period elements BBeONLiCAtomic radii8811166 7415277(a) Write the elements in the ascending order of their atomic radii. (b) Which of the 2nd period elements closer to the configuration of inert gas ? (c) Which is the outermost orbit of all these elements ? (d) Which elements atomic size bigger Beryllium or Carbon ? Why ?

Answer»

(a) The ascending order of atomic sizes is O, N, C, B, Be and Li.

(b) Lithium has closest inert gas configuration i.e., 1s² 2s¹.Its nearest inert gas is Helium.

(d) Beryllium has more atomic size than Carbon. Because when we move across a period the atomic number increases. So nuclear attraction of outermost orbit increases. So carbon has lesser size than Beryllium.

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