Atomic radius, an Uncommon card

The card carries these facts from its Wikipedia article.

• Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius.
• Five widely used definitions of atomic radius are covalent radius, Van der Waals radius, charge radius, ionic radius, and metallic radius.
• Typically, because of the difficulty to isolate atoms in order to measure their radii separately, the atomic radius is measured in a chemically bonded state, however, theoretical calculations are simpler when considering atoms in isolation.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Atomic radius article was read about 50,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 72 and blocks with 46: each hit it takes is cut by 18 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Atomic radius in the power ranking, all domains together.