What is the best definition of an element? a. an element is a substance that cannot be broken down. b. an element is a positively charged particle. c. an element is a substance only found in stars.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

How to calculate the mass of copper

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.