Kit Library / Science / Chemistry
⚡ Topic Learning KitShared by a Veda learner · Generated with Veda AI
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.
Properties repeat with atomic number.
The Modern Periodic Law states that the properties of elements are a periodic function of their atomic number (not atomic mass). This is the foundation of the periodic table.
↳ Atomic number, not mass, governs periodicity.
Rows and columns organize elements.
A period is a horizontal row (7 periods). A group is a vertical column (18 groups). Elements in the same group have the same valence electron configuration.
↳ Groups share chemical behavior due to valence electrons.
More protons, same shell, smaller radius.
Across a period, effective nuclear charge increases because protons increase while shielding by inner electrons stays constant. This pulls valence electrons closer, decreasing atomic radius.
↳ Increased nuclear charge shrinks atomic size across a period.
This chapter explains how elements are classified in the periodic table based on atomic number, and how various properties like atomic radius, ionization enthalpy, electron gain enthalpy, and electronegativity show perio...
~8 min · full explanation, examples & memory tricks in the app
17 questions laddered from warm-up to topper-level, each with an explanation. A taste:
Which of the following is the correct order of increasing atomic radii for the elements Li, Be, B, C, N, O, F?
BeginnerF < O < N < C < B < Be < Li
Across a period, atomic radius decreases due to increasing effective nuclear charge, so F has the smallest radius and Li the largest.
Which element has the highest first ionization enthalpy in the second period?
IntermediateNe
Ionization enthalpy generally increases across a period. Ne, being a noble gas with a stable octet, has the highest first ionization enthalpy in the second period.
Which of the following elements has the highest electronegativity according to Pauling scale?
BeginnerF
Fluorine is the most electronegative element on the Pauling scale (3.98).
The correct order of electron gain enthalpy (more negative to less negative) for the halogens is:
IntermediateCl > F > Br > I
Chlorine has the most negative electron gain enthalpy among halogens because of its smaller size and effective nuclear charge; fluorine's small size causes electron-electron repulsion, making its electron gain enthalpy less negative than chlorine.
18 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.
