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 any two elements that have two electrons in their valence shell.
Name three elements that have a single electron in their 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?
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).
Atoms of seven elements A, B, C, D, E, F, and Ghave different number of electron shells but have the same number of electrons in the outermost shells. How do the following properties vary as we move from A to G? (i) Metallic character (ii) Atomic radii (iii) Valency?
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
