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 : holmium Symbol : ho Atomic no. : 67 Melting Point (deg c) : 1474 Boiling Point (deg c) : 2700 Discoverer : delafontaine and soret (1878) .. More >>