Periodic Table Concepts

What we verified before publishing

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The following claims were verified through Perplexity Sonar before the questions were finalised. The host can reference any of them during play:

• The periodic table organizes all 118 known chemical elements into rows called periods and columns called groups based on increasing atomic number.
• An element's atomic number equals the number of protons in the nucleus of its atom.
• Hydrogen is the first element with atomic number 1, containing exactly one proton.
• Elements in the same group (vertical column) have similar chemical properties due to having the same number of valence electrons.
• Dmitri Mendeleev published the first version of the periodic table in 1869 and is credited as its inventor.
• The table classifies elements into three main categories: metals, nonmetals, and metalloids based on their physical and chemical properties.
• Noble gases are a group of elements in column 18 that are chemically inert and exist as single atoms under standard conditions.
• Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons.
• Atomic mass listed in the periodic table is the weighted average mass of an element's isotopes.
• The periodic law states that when elements are arranged by atomic number, their chemical and physical properties show a recurring pattern.
• Oganesson is the element with the highest atomic number, 118, marking the end of the current periodic table.
• The 73 primordial elements plus bismuth, thorium, and uranium make up the 83 elements that survived from Earth's formation.