Elementle

Elementle asks you to find one mystery element each day, the same for everyone. In the classic mode you type an element's name and the game compares it with the answer on several properties: atomic number, period, group, block, state at room temperature, chemical family and discovery era. Green means a match, orange and yellow mean close, red means no match, and an arrow on the atomic number tells you to go higher or lower. A summary bar above the table gathers what you have pinned down so far, such as the range the atomic number must fall in. You have eight tries.

When the day is solved, a results card shows your attempts, time and streak, with a spoiler-free share button and a countdown to the next element. From there the game offers other ways to keep playing. Hard mode drops the atomic number clues. Endless gives one classic round after another, not tied to the day. Clue mode reveals hints one by one, from what the element is not to exact details like its symbol. Practice runs through the whole table with up to three guesses per element, and a set challenge has you name every element in a period or group before you run out of mistakes.

A new daily arrives at midnight UTC. There is no sign-up and no ads, and a challenge link lets you send a friend the same puzzle. It suits students revising chemistry and anyone who likes attribute games such as Poeltl or Spotle.