radium

4 subentries

• radium
• gamma ray emission (42:5.1,7)
• positive particles fly off at 10,000 miles/second (42:7.3,5)
• r. clock is most reliable timepiece (57:7.3)
• uranium disintegration by emissions of (42:4.12)

Cited alongside

Headwords that cite the same paragraphs as this one, commonest first. The number is how many subentries each has.

• atoms 20
• elements (chemical) 10
• energy 128
• gamma rays 1
• radioactivity 4