SUBHASH PUBLICATION|Exercise VALUE BASED QUESTIONS|8 Videos
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Name: a) three elements that have a single electron in their outermost shells b) two elements that have two electrons in their outermost shells . c) three elements with filled outermost shells
Name three elements with seven valence electrons in their outermost shell. How do their non-metallic character and atomic size change down the group?
Name Two elements that have two electrons in their outermost shells.
Given below are some elements of the Modern Periodic Table: ""_(4)Be, ""_(26)Fe.""_(14)Si, ""_(19)K ""_(20)Ca i) Select the element that has one electron in the outermost shell and write its electronic configuration. ii) Select two elements that belong to the same group. Give reason. iii) Select two elements that belong to the same period. Which one of the two has a bigger atomic size?
From the following elements : _(4)Be,_(9)F,_(19)K,_(20)Ca (i) Select the element having one electron in the outermost shell. (ii) Two elements of the same group. Write the formula and mention the nature of the compound formed by the union of _(19)K and element X (2,8,7).
Name any two elements that have two electrons in their valence shell.
The electrons in the atoms of four elements A, B, C, and D are distributed in three shells having 1,3,5, and 7 electrons in their outermost shell respectively. State one period in which these elements can be placed in the Modern Periodic Table. Write the electronic configuration of the atoms A and D and molecular formula of the compound when A and D combine.
SUBHASH PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-VALUE BASED QUESTION
