9 Grammatical Pitfalls
The symbol for the element einsteinium.
The symbol for einsteinium.
An irrational number, with a numerical value of 2.718281828459.... It is mathematically defined as the limit of (1 + 1/n )n as n grows infinitely large. It is the base of natural logarithms and has many applications in mathematics, especially in expressions involving exponential growth and decay.
A synthetic, radioactive metallic element of the actinide series that is usually produced by bombarding plutonium or another element with neutrons. It was first isolated in a region near the explosion site of a hydrogen bomb. Its longest-lived isotope is Es 254 with a half-life of 276 days. Atomic number 99; melting point 860°C. See Periodic Table.