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Grade 12 Periodic Table Groups & Trends Worksheet with Answers

Grade 12 (US) · Year 13 (UK) · Class 12 (India) · Chemistry

Unit 1: Structure of MatterTrends & BondingNGSS HS-PS1-2

Groups, periods and trends in atomic radius, ionization energy and electronegativity. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Periodic Table Groups & Trends

Grade 12 · Chemistry

Score___ / 12

Name

Class

Date

Learning goal: Trends & Bonding · NGSS HS-PS1-2

Directions: Read each question carefully and write your answer on the line.

RememberPeriodic table trends

across a period →down a group ↓Atomic radius: grows ↓ and ←Electronegativity: grows ↑ and →Ionization energy: grows ↑ and →Group 1: alkali metalsGroup 17: halogens · 18: noble gases
  1. 1

    Elements in the same group have the same number of what?

  2. 2

    Which element is the most electronegative?

  3. 3

    Does atomic radius increase or decrease going across a period (left to right)?

  4. 4

    Does atomic radius increase or decrease going down a group?

  5. 5

    What are columns of the periodic table called?

  6. 6

    Does ionization energy increase or decrease across a period?

  7. 7

    Which group contains the alkali metals?

  8. 8

    Why are noble gases unreactive?

  9. 9

    Which group contains the noble gases?

  10. 10

    What are rows of the periodic table called?

  11. 11

    Where are metals found on the periodic table?

  12. 12

    Why are alkali metals so reactive?

★ Challenge corner for fast finishers

Does a kilogram of feathers weigh more than a kilogram of iron?

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Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/chemistry/12/periodic_trends

Answer key (click to show)
  1. 1.valence electrons
  2. 2.fluorine
  3. 3.decrease
  4. 4.increase
  5. 5.groups (families)
  6. 6.increase
  7. 7.group 1
  8. 8.they have full outer electron shells
  9. 9.group 18
  10. 10.periods
  11. 11.on the left and center
  12. 12.they easily lose their single valence electron
  13. ★no — they weigh the same (challenge corner)

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