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The electronic structure of four elements A, B, C, D are:
(1) 1s2
(2) 1s2, 2s2, 2p2,
(3) 1s2, 2s2, 2p5,
(4) 1s2, 2s2, 2p6
Ans: 1s2, 2s2, 2p5,
GROUP 13: ALUMINUM TO THALLIUM The substance aluminum, indium, gallium and thallium have valence electron configurations (ns) 2 (np) 1 and for the lighter elements their chemis
P-BLOCK GROUP ELEMENTS: The p block elements are belong to group 13 to 18.the outermost electronic configuration is ns2 np1 to ns2 np6.these are called represen
Which have the same number of S electrons as the d - electrons in fe2+
transition elements form coloured compound. Why?
Difference between DNA and RNA DNA RNA DNA has a double helix structure. RNA comprises a single helix structure.
trailing of mercury
why HNO3 is not used for detection of acidic radical of 1st and 2nd group ions?
The compound in which cation is isoelectronic with anion is : (1) NaCl (2) CsF (3) NaI (4) K 2 S Ans: K 2 S
What is the upac name of CH-CH-CH-OH
Energy of the electron in Hydrogen atom is given by: (1) E n = 131.38/ n 2 x kj mol -1 (2) E n = 131.33/n xkj mol -1 (3) E n = 1313.3/ n 2 x kj mol
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