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Andheri West, Mumbai, India - 400053
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State, CBSE
CBSE Subjects taught
Science, Social science, Mathematics
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Science, Mathematics, Social Science
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State, CBSE
CBSE Subjects taught
Chemistry, Mathematics, Biology, Accountancy, Physics, Economics
State Syllabus Subjects taught
Chemistry, Economics, Accountancy, Physics, Biology, Mathematics
Class Location
Online (video chat via skype, google hangout etc)
At the Institute
Board
State, CBSE
CBSE Subjects taught
Chemistry, Mathematics, Biology, Accountancy, Physics, Economics
State Syllabus Subjects taught
Chemistry, Economics, Accountancy, Physics, Biology, Mathematics
Class Location
Online (video chat via skype, google hangout etc)
At the Institute
Board
State, CBSE
CBSE Subjects taught
Science, Social science, Mathematics
State Syllabus Subjects taught
Science, Mathematics, Social Science
Class Location
Online (video chat via skype, google hangout etc)
At the Institute
Engineering Entrance Exams
GATE Coaching Classes, IIT JEE Coaching Classes
Type of class
Crash Course, Regular Classes
IIT JEE Coaching
IIT JEE Advanced Coaching, IIT JEE Mains Coaching, IIT JEE Foundation Course, IIT JEE Crash Course, IIT JEE Integrated Coaching
IIT-JEE Subjects
Chemistry , Physics , Maths
Class Location
Online (video chat via skype, google hangout etc)
At the Institute
Board
State, CBSE
CBSE Subjects taught
Science, Mathematics, Social Science
State Syllabus Subjects taught
Science, Social science, Mathematics
Class Location
Online (video chat via skype, google hangout etc)
At the Institute
Board
State, CBSE
CBSE Subjects taught
Science, Mathematics, Social Science
State Syllabus Subjects taught
Science, Social science, Mathematics
Class Location
Online (video chat via skype, google hangout etc)
At the Institute
Board
State, CBSE
CBSE Subjects taught
Science, Mathematics, Social Science
State Syllabus Subjects taught
Science, Social science, Mathematics
5 out of 5 1 review
Varun Kokane
"Best coaching class in andheri west,all other classes are nothing against excellence classes. Best guidance. "
Answered on 16/10/2019 Learn CBSE/Class 11/Science/Chemistry/The s-Block Elements/NCERT Solutions/Exercise 10
The distance between the valence electron and the nucleus is less in sodium than potassium. So sodium has a greater electrostatic force between nucleus and valence electrons which doesn't let it lose electrons easily. Whereas, in potassium, due to the weaker electrostatic force than sodium, it can lose electrons easily. So as the atomic size increases down the alkali group, the electrostatic force becomes weaker and reactivity increases.
Answered on 16/10/2019 Learn CBSE/Class 11/Science/Chemistry/The s-Block Elements/NCERT Solutions/Exercise 10
Answered on 16/10/2019 Learn CBSE/Class 11/Science/Chemistry/The s-Block Elements/NCERT Solutions/Exercise 10
Answered on 09/10/2019 Learn CBSE/Class 11/Science/Chemistry
Answered on 08/10/2019 Learn CBSE/Class 11/Science/Chemistry/The s-Block Elements/NCERT Solutions/Exercise 10
Physical Properties:
Metallic Character: As their size is large, its outermost electron is far from the nucleus and can be easily removed. As forces are weak, they will have low melting and boiling point. This group shows the metallic character due to its low ionisation energy, consequently making it more electropositive showing oxidation state of +1. Ionisation energy decreases as we move down this group. Due to its larger size, it also has a low density.
Soft: As the bond gets weaker due to its larger size, this group metals are softer.Softness increases as we move down the group.
Chemical Properties:
Reaction with halogens: Alkali metals burn in halogen which later forms halides.
Reaction with water: When alkali metals react with a water molecule, they give out hydrogen.
Reaction with oxygen: Alkali metals burn in oxygen, which later forms
oxides.
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Andheri West,
Mumbai
