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Periodic Table – GK Quiz with Answers – Level 3

Hard chemistry GK that asks why: why octaves broke down, how Mendeleev's gaps were filled and what drives atomic size and metallic character across the table.

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Questions, answer key and solutions.

Questions
50
Duration
35 min
Marks
50

Negative marking

Attempts
100
Access
Free
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Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 35-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

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How the two modes differ
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Normal

Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
  • Open to guests. Normal practice needs no sign-in.
Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 35 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Periodic Table GK Level 3 Practice Quiz: Classification History and Trends

This Level 3 Periodic Table GK quiz helps you check whether you can explain why the periodic table looks the way it does, not just recall facts about it. The Aptitude360 set follows the classification of elements from Döbereiner's triads to Moseley's Modern Periodic Law. It then moves to the reasons behind trends in atomic size and metallic character.

What the hardest periodic table level examines

  • Döbereiner's sets of three similar elements and their limits
  • Newlands' Law of Octaves, built on increasing atomic mass, and why it held only for lighter elements
  • Mendeleev's arrangement by atomic mass and chemical properties, the gaps he left and the Eka elements he predicted
  • Moseley's finding that atomic number is more fundamental than atomic mass
  • Groups, periods and why members of a group share valence electrons
  • Atomic size and metallic character across a period and down a group
  • Metalloids such as arsenic and antimony on the metal and non-metal border

Classification ideas worth revising closely

  • Eka-boron became scandium, Eka-aluminium became gallium and Eka-silicon became germanium
  • Newlands and Mendeleev both used atomic mass, while the modern law rests on atomic number
  • Rising nuclear charge pulls electrons closer across a period; added shells enlarge atoms down a group
  • The order of events from triads to the modern table

Smart ways to study periodic table reasoning

  • Build a timeline of each scientist, his basis of arrangement and his key idea
  • Compare an element at the lower left with one at the upper right to settle any trend question
  • Read each statement for swapped words such as period and group, or increases and decreases

Who gets most from this level

General Awareness aspirants who already know the basic structure of the periodic table and want harder chemistry practice before revision ends.

FAQs about Periodic Table – GK Quiz with Answers – Level 3

What elements did Mendeleev predict in the periodic table?
Mendeleev left gaps for undiscovered elements and named them with the prefix Eka. Eka-aluminium, Eka-silicon and Eka-boron were later found to be gallium, germanium and scandium.
Why did Newlands' law of octaves fail?
The law worked only for the lighter elements. For heavier elements, every eighth element no longer showed properties similar to the first, so the pattern broke down.
What is the Modern Periodic Law?
It states that the properties of elements are a periodic function of their atomic number. Moseley showed that atomic number is a more fundamental property than atomic mass.
Why does atomic size increase down a group?
Moving down a group, a new electron shell is added at each step. The outer electrons sit farther from the nucleus, so the atom becomes larger.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Periodic Table GK Level 35035 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

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