HELP!! Earth's magnetic reversals are recorded in

A. the asthenosphere
B. sea-floor rock
C. deep-ocean trenches
D. the mantle

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

What is the percentage composition of carbon in the compound ch4

In water, a strong acid will break down into its component parts. a. completely b. partly c. never in water, a weak base will break down into its component parts. a. completely b. partly c. never