The Periodic Table Flashcards
What does the Modern Periodic Law State?
The physical and chemical properties of all elements are the periodic function of their atomic number.
Who proposed the Modern Periodic Table
Henry Mosely in the year 1921
explain the structure of the table
It consists of:
1. Periods- 7 Horizontal rows
2. Groups- 18 Vertical Columns
mention the groups that are known as transition elements
3 4 5 6 7 8 9 10 11 12
mention the groups that are known as representative or normal elements
1 2 13 14 15 16 17
what are the noble gases?
Helium neon argon krypton xenon radon
why is zero group/inert/noble/rare gases name given?
because they have stable configuration following the octet rule.
What are group 1 elements known as
Alkali metals
what are group 2 elements known as
Alkaline earth metals
what are group 17 elements known as
Halogens (salt producers)
Give the simple classification of elements
- Representative elements
- Transition elements
- Inert gases
- Inner Transition elements which include lanthanoids and actinoids.
Define Periodicity
The properties that reoccur after a regular interval in the periodic table are periodic properties and the phenomenon is known as periodicity.
What are the factors on which Properties of an element depends upon ?
- Atomic radius/size
- Metallic Character
- Non-Metallic Character
- Ionisation Energy
- Electron Affinity
- Electronegativity
Define Ionisation Energy
It is the energy required to remove an electron from the outermost shell of an atom in its isolated gaseous state, thereby converting it into a positively charged ion.
Define Electron Affinity
Electron Affinity is the energy released on adding an electron to the outermost shell of an atom in its isolated gaseous state, thereby converting it into an anion.
