The document lists various chemical and physical properties of elements including: - Electronegativity ranges from lowest in cesium to highest in fluorine. - Ionization potential ranges from lowest in cesium to highest in helium. - Electron affinity ranges from lowest in noble gases to highest in chlorine. - Melting/boiling points of metals range from lowest in mercury to highest in tungsten. - Melting/boiling points of non-metals range from lowest in helium to highest in diamond.

1. Prashant Mehta Ph.D.
Edu. Strategy Consultant
Email -prashantmehta1@rediffmail.com
ELEMENTS
FACTS TO REMEMBER

2. ELECTRONEGATIVITY
LOWEST HIGHEST
Cesium
(Cs)
Fluorine
(F)

3. IONIZATION POTENTIAL
LOWEST HIGHEST
Cesium
(Cs)
Helium
(He)

4. ELECTRON AFFINITY
LOWEST HIGHEST
Noble Gases
(Zero)
Chlorine
(Cl)

5. MELTING / BIOLING POINT - METAL
LOWEST HIGHEST
Mercury (Hg)
(-38.9◦ C)
Tungsten (W)
(3140◦ C)
◦

6. MELTING/BOILING POINT–NON METAL
LOWEST HIGHEST
Helium (He)
(B.P -268.9◦ C)
Diamond
Allotrope of C
◦

7. ELETROPOSITIVE ELEMENT
MOST LEAST
Francium
(Fr)
Fluorine
(F)
◦

8. ATOMIC SIZE
SMALLEST LARGEST
Helium
(He)
Cesium
(Cs)
◦

9. ANION
LARGEST SMALLEST
Astatine
(At-)
Fluorine
(F-)
◦

10. REFRACTIVE INDEX
LOWEST SMALLEST
Vacuum /
Air (1)
Diamond
(2.4)
◦

11. METALLOID
LIGHTEST HEAVIEST
Boron
(B)
Tellurium
(Te)
◦

12. SOLID METAL
LIGHTEST HEAVIEST
Lithium
(Li)
Osmium
(Os)
◦

13. SOLID NON METAL
LIGHTEST HEAVIEST
Boron
(B)
Astatine
(At)
◦

14. GASEOUS NONMETAL
LIGHTEST HEAVIEST
Hydrogen
(H)
Radon
(Rn)
◦

15. BEST CONDUCTOR
METALS
NON
METALS
SILVER (Ag) GRAPHITE
◦

16. POOR CONDUCTOR OF CURRENT
METALS
NON
METALS
Lead (Pb) Sulphur (S)
◦

17. MOST REACTIVE - ELEMENT
SOLID
FORM
LIQUID
FORM
GAS
FORM
Lithium
(Li)
Cesium
(Cs)
Fluorine
(F)