Quizzes, tests, exercises and puzzles for English as a Second Language (ESL), English as a foreign language (EFL), Teaching EFL (TEFL), Test of EFL (TOEFL), English for speakers of other languages (ESOL), Teaching ESOL (TESOL), TOEIC.
Element
Element : lawrencium Symbol : lr Atomic no. : 103 Melting Point (deg c) : 1627 Boiling Point (deg c) : Discoverer : ghiorso et al. (1961) .. More >>