Periodic Table quiz
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What are the horizontal rows across the periodic table called?
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More questions about Periodic Table
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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Which metal has the chemical symbol Ag?
Answer: Silver
Why: Argentina derived its name from argentum after early European explorers believed the region held vast silver riches.
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Which three-element groupings did early chemists use to spot patterns?
Answer: Triads
Why: Döbereiner showed that the atomic weight of strontium sat almost perfectly midway between the weights of calcium and barium.
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Which English letter never appears in any element symbol?
Answer: J
Why: Mendeleev's 1869 table listed iodine as J, but today's symbol is I and no current element symbol contains J.
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Which element is the main semiconductor in modern computer chips?
Answer: Silicon
Why: Journalist Don Hoefler popularised the name Silicon Valley in a 1971 Electronic News article on the area's chip makers.
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Which nonmetal exists as a liquid at room temperature?
Answer: Bromine
Why: Bromine produces a dense reddish-brown vapor at room temperature and emits an intensely irritating odor.
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What placeholder name did Mendeleev give to his predicted element gallium?
Answer: Eka-aluminium
Why: Mendeleev used the Sanskrit prefix eka, meaning one, to designate an element sitting one row below a known homologue.
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