The age of the Hawaiian islands gets older as you move from East to west. If the half life of k-40 is 1.3 billion years old, approximate the age of Maui if a sample rock on the island has 99.96% of its parent k-40 remaining.
A. 440,000 years
B. 750,000 years
C. 5.2 million years
D. 1.3 millions years

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

Classify this reaction: 2al+n2-> aln.

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?