EXERCISE CHAPTER 02, NBF CHEMISTRY XI
MCQ’S I a. All above II (b) Be , because it is poly electron systm III (b) matter contained electrons IV (b) – Ze2/4π€r V (d) spin quantum number VI …
Read MorePERIODIC TABLE OF ELEMENTS
PERIODIC TABLE OF ELEMENTS
Read MoreGROUND-STATE ELECTRON CONFIGURATION OF ELEMENTS
n+l RULE So far we have considered the electron configuration of simple atoms. For complicated atoms which may contain many electrons and have many energy levels or orbitals, the ‘building …
Read MoreQualities Of A Good Précis
A good piece of précis should possess the following qualities; Conciseness: A good précis is always written in the fewest possible words. The writer expresses only the gist, …
Read MoreRules Of Précis Writing
The rules of précis writing are penned down as follows; Carefully read the passage: Before the writer starts making précis of the passage it should be read two or three …
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https://www.observenigeria.com/wp-content/uploads/2016/07/Literature_Stock-Photo.jpgIntroduction: Précis writing is a very fine exercise in a reading; writing and practical life for those who have to carry on communication with others. Précis is neither a …
Read MoreBasic Definitions
Matter Anything that has mass and occupies space is called matter. Examples Water, wood, air, paper, gold etc. Classification of Matter All materials are either a substance or a mixture. …
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Atomic and Physical Properties of the Period 3 Elements
Atomic Properties Electronic Structures In Period 3 of the Periodic Table, the 3s and 3p orbitals are filling with electrons. Just as a reminder, the shortened versions of the electronic …
Read MorePeak value:
The maximum value of current in any direction,either positive or negative direction is called peak value.
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