Periodic Table
Master the periodic table of elements. Identify elements by symbol, atomic number, and properties
About Periodic Table Master
Periodic Table Master is a chemistry training game · each round names an element and you identify it by symbol, atomic number, group, or position on the table. The game covers every element from Hydrogen (1) to Oganesson (118), so a complete run takes you from the first-period basics to the heaviest synthesised actinides.
All 118 elements, in their real positions. The visual layout matches the standard periodic table · 7 periods × 18 groups, with the lanthanides and actinides split out as the conventional two extra rows. Spatial position is part of the answer: knowing that Oxygen sits at period 2, group 16 is part of knowing oxygen.
Why the table is shaped that way. Elements line up in groups because they share the same outer-shell electron count, which dictates their chemistry. Group 1 is the alkali metals (one outer electron · highly reactive). Group 17 is the halogens (seven outer electrons · need one more for a full shell · also highly reactive). Group 18 is the noble gases (full outer shell · almost no chemistry). Once you understand the shape, you can predict how a new element will behave.
Progressive difficulty. Difficulty 1-3 sticks to the first 20 elements · the ones in every basic chemistry curriculum. Difficulty 4-6 expands to the first 50, which covers most of the elements you'll meet in real laboratories. Difficulty 7-10 includes the full 118, the transition metals, the lanthanides, and the synthetic actinides at the bottom of the table where memorisation is the only path.
Deterministic elements. Every round is generated from a seed, so the same seed always shows the same element with the same options. Useful for classroom drills and self-paced study schedules · share a seed range and a whole class works through identical questions.
Part of the PlayMemorize family of brain-training games. Runs entirely in your browser, works offline as a Progressive Web App.
FAQ
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Why memorize the periodic table?
The periodic table is the foundation of chemistry. Knowing element symbols, atomic numbers, and group properties helps with chemical equations, bonding, and understanding reactions. Fast recognition is especially useful in chemistry courses and labs. -
What is atomic number?
The atomic number is the number of protons in an atom's nucleus. It uniquely identifies each element · Hydrogen is 1, Helium is 2, and so on. The periodic table is arranged by atomic number. -
What is a group?
Groups are vertical columns in the periodic table. Elements in the same group share similar chemical properties because they have the same number of valence electrons. For example, all alkali metals are in Group 1. -
What is a period?
Periods are horizontal rows in the periodic table. The period number tells you how many electron shells an atom has. Period 1 elements have 1 shell, Period 2 elements have 2 shells, and so on. -
How does difficulty work?
Difficulty 1-3 focuses on the first 20 elements · the most common ones. Difficulty 4-6 expands to the first 50. Difficulty 7-10 includes all 118 elements, including rare transition metals and lanthanides. -
What if I get it wrong?
The round ends and the correct answer is revealed. You see the element on the periodic table so you learn its position and properties. -
Can I play offline?
Yes. PlayMemorize is a Progressive Web App. Once installed, Periodic Table Master works without an internet connection. -
How does my progress save?
Your best streak per (element range, difficulty) combination is stored locally in your browser. Mastering the first 20 elements keeps its own record separate from the full 118. Sign in to sync the same records across phone, tablet, and desktop.