Beryllium Be Atomic Number: 4 Atomic Mass: 9.012 Half life; 53.3 days-2,600,00yrs ______________________________________________________________________________ Sources: - Coal combustion, cigarette smoke, beryllium extraction plants, ceramics plants, beryllium alloy manufacturing - Oral ingestion okay, inhalation results in longer retention Adverse Effects: - Deposits in liver and bones - Acute: Acute chemical pneumonitis - Chronic: Lung granulomas (chronic beryllium disease or berylliosis, lung cancer