ELEMENT IDENTIFICATION
Fe
Atomic No: 26
Iron (Transition Metal)
Tap card to reveal element name
Score: 0
Streak: 🔥 0
What is the symbol for Sodium?
Group 1 Mnemonic
Alkali Metals (Li, Na, K, Rb, Cs, Fr)
Standard competitive exam mnemonic for Group 1 Elements:
"HaLiNa Ka Rab Se Fariyad"
• H (Hydrogen) | Li (Lithium) | Na (Sodium)
• K (Potassium) | Rb (Rubidium) | Cs (Caesium) | Fr (Francium)
• H (Hydrogen) | Li (Lithium) | Na (Sodium)
• K (Potassium) | Rb (Rubidium) | Cs (Caesium) | Fr (Francium)
Group 2 Mnemonic
Alkaline Earth Metals (Be, Mg, Ca, Sr, Ba, Ra)
Class 9–10 foundation rhyme to memorize Group 2 without confusion:
"Beta Mange Car Scooter Baap Razi"
• Be (Beryllium) | Mg (Magnesium) | Ca (Calcium)
• Sr (Strontium) | Ba (Barium) | Ra (Radium)
• Be (Beryllium) | Mg (Magnesium) | Ca (Calcium)
• Sr (Strontium) | Ba (Barium) | Ra (Radium)
Periodic Trends Law
Universal Periodic Trend Arrows
How physical and chemical properties shift across the table:
• Atomic Radius: Increases Down a group ↓, Decreases Across a period →
• Ionization Energy & Electronegativity: Decreases Down a group ↓, Increases Across a period →
• Most Electronegative Element: Fluorine (F)
• Ionization Energy & Electronegativity: Decreases Down a group ↓, Increases Across a period →
• Most Electronegative Element: Fluorine (F)
Magic Numbers
Electronic Shell Magic Numbers (2, 8, 8, 18, 18, 32)
Add these magic steps to determine the atomic number of the next element in any group:
Group 1 Example:
• H (1) + 2 = Li (3)
• Li (3) + 8 = Na (11)
• Na (11) + 8 = K (19)
• K (19) + 18 = Rb (37)
• Rb (37) + 18 = Cs (55)
• Cs (55) + 32 = Fr (87)
• H (1) + 2 = Li (3)
• Li (3) + 8 = Na (11)
• Na (11) + 8 = K (19)
• K (19) + 18 = Rb (37)
• Rb (37) + 18 = Cs (55)
• Cs (55) + 32 = Fr (87)