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Across or down

Exercise and reference answers

Upper category
Across
Lower category
Down
Items
  1. Category
    Across
    Item
    Size falls
  2. Category
    Across
    Item
    Charge up
  3. Category
    Across
    Item
    Set shells
  4. Category
    Across
    Item
    Valence up
  5. Category
    Down
    Item
    Size grows
  6. Category
    Down
    Item
    New shells
  7. Category
    Down
    Item
    Same outer
  8. Category
    Down
    Item
    More rows
Instructions
Send each trend to the across a period track or the down a group track.

Explanation

_Source: syllabus Science Class X, Chapter 5, Periodic Classification of Elements._
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