(a) What are valence electrons ? Where are valence electrons situated in an atom ? (b) What is the …

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An element X belongs to 3rd period and group 2 of the periodic table. State: (a) number of valence …
The nucleus of an atom has 5 protons and 6 neutrons. What would be the (a) atomic number, (b) mass n…
In a regular B_(12) icosahedran : (a) How many boron atoms are equidistant from a given boron atom …
(a). Write the electron arrangement in (i) a magnesium atom, and (ii) an oxygen atom. (b). How many…
Fill in the blanks in the following statements: (a) The horizontal rows in a periodic table are cal…
Four elements A (with one valence electron), B (with three valence electrons), C (with five valance …
An element has atomic number 13 and an atomic mass of 27 (a) How many electrons are there in each a…
The sum of all the quantum numbers of all the A valence electrons of an atom of an inert gas is 22. …
(a) What is the usual number of valence electrons and valency of group 18 elements of the periodic t…

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How many electrons are present in the valence shells of the central atoms in the molecules of BeCl_(…
In which element (a) There are two shells and both are filled with electrons? (b) Electronic confi…
An element E has following electronic configuration : {:(K,L,M,),(2,8,6,):} (a) To which group of …
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How many electrons are in the outermost shell of an atom of phosphorus (p)? consult the periodic ta…
Sulfur (s) is in group 16 of the periodic table. how many valence electrons dos an atom of sulfur h…
1: Consult an aufbau diagram. How many electrons would make the d shell complete? A. 1 B. 2 C. 6 D….
How do how do you know the number of valence electrons in an atom from the periodic table? User: Ho…
How does the number of valence electrons in an atom relate to the elements placement on the periodi…

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Fluorine has an atomic number 9. It is in period 2 of the periodic table. The diagram shows the ele…

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