Veto q&a 7 Month22 (1)

Q & A
@three faces
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TipTop
Alkali Metal in
Psychiatric Medicines
groups in the Periodic Table
• The vertical columns in a periodic table are called
groups
Q The number of groups in Mendeleev (Ancient)
periodic table
A. 7
Q The number of groups in Modern (Mosely)
periodic table
A. 18
Q The elements included in 1, 2 and 13-18 groups
are known as
A. Representative elements
Q The elements included in 3-12 groups in the
periodic table are known as
A. Transition elements
group
Number
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Q & A In depth
group Name Block Name Valency
1 Alkali Metals S-Block 1
2 Alkaline Earth Metals S-Block 2
3-12 Transition elements D-Block
Variable
Valency
13 Boron Family P-Block 3
14 Carbon Family P-Block 4
15 Nitrogen Family P-Block 5
16 Oxygen Family P-Block 6
17 Halogens P-Block 7
from top to bottom (groups)
in the Periodic Table
↑ Atomic size increases
↑ Metallic character increases
↑ Electro positivity increases
↓ Electro negativity decreases
↓ Electron Affinity decreases
↓ Ionization Energy decreases
↓ Ionization potential decreases
18 Noble/inert gas P-Block 8
• Valency - the number of electrons in the last shell
of an atom
• Lanthanides and Actinides are included in the
F-Block of the Periodic Table
ALKALI MetALs (GrOuP 1)
• Alkali Metals react with water and forms strong
Alkalis, hence the name Alkali metals.
Element Atomic Number Atomic Mass Symbol
Lithium 3 6.94 Li
Sodium 11 22.99 Na
Potassium 19 39.10 K
Rubidium 37 85.47 Rb
Caesium 55 132.91 Cs
Francium 87 223 Fr
54
Q&AUbdn current affairs & gk
January 2018