six elements have the atomic number as shown below answer the questions that follow
elements a. b. c. d. e. f.
atomic number. 12. 17. 18. 7. 9. 11
1) the element with lowest electeon affinity
2)the element with the largest atomic size
3)the element taht belongs to the third periodic and as the highest ionization potential
4)the element which is an alkaline earth metals
Answers
Explanation:
1.The electron affinities of the noble gases have not been conclusively measured, so they may or may not have slightly negative values. Chlorine has the highest Eea while mercury has the lowest.
2.The atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
3.It is because of the shielding effect that the ionization energy decreases from top to bottom within a group. From this trend, Cesium is said to have the lowest ionization energy and Fluorine is said to have the highest ionization energy (with the exception of Helium and Neon).
4.The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).[1] The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.
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