1. In modern periodic table, which are the metals, non metals and metalloids among the first 20 elements?
Ans. In the modern periodic table, among the first 20 elements, following are the metals, non – metals and metalloids.
Metals
|
Non metals
|
Metalloids
|
Lithium (Li)
Beryllium (Be)
Sodium (Na)
Magnesium (Mg)
Aluminium (Al)
Potassium (K)
Calcium (Ca)
|
Hydrogen (H)
Helium (He)
Carbon (C)
Nitrogen (N)
Oxygen (O)
Fluorine (F)
Neon (Ne)
Phosphorus (P)
Sulphur (S)
Chlorine (Cl)
Argon (Ar)
|
Boron (B)
Silicon (Si)
|
REFER THESE SCIENCE AND TECHNOLOGY CHAPTERS FOR YOUR STUDIES.
CH. NO. 1 SCHOOL OF ELEMENTS
CH. NO. 2 THE MAGIC OF CHEMICAL REACTIONS
CH. NO. 3 ACID BASE CHEMISTRY
CH. NO. 4 ELECTRIC SPARK
CH. NO. 5 ELECTROMAGNETISM
CH. NO. 6 WONDERS OF LIGHT PART - I
CH. NO. 7 WONDERS OF LIGHT PART II
CH. NO. 8 UNDERSTANDING METALS NON METALS
CH. NO. 9 AMAZING WORLD OF CARBON COMPOUNDS
CH. NO. 10 LIFE'S INTERNALSECRETS
CH. NO. 11 REGULATORS OF LIFE
CH. NO. 12 LIFE CYCLE
CH. NO. 13 MAPPING OUR GENES
CH. NO. 14 STRIVING FOR BETTER ENVIRONMENT PART I
CH. NO. 15 STRIVING FOR BETTER ENVIRONMENT PART - II
