An element is identified by:

A. Its number of protons

B. the atomic mass

C. The type of charge

D. its number of isotopes

In which layer of earth do most earthauakes occur A_ inner core B_outer core C_mantle D_crust

Which of the following is not equal to 100 meters A 0.100 kilometers B 10 hectometers C10,000 centimeters D 100,000 millimeters

What is Kepler's 2nd law state

List three examples of observation of Earth by remote-sensing satellites

According to Le Châtelier's principle, what happens if heat is added to a system? A. The reaction rate speeds up B. the reaction shifts to remove the heat C. more reactants and products form D. the heat does not upset the equilibrium

List the symbols for all the elements with electron configurations that end as follows. Each n represents an energy level.

Why is it necessary for the measuring devices to be clean

Copper consists of two naturally occuring isotopes. their masses are 62.930 amu and 64.928 amu. calculate their abundances.

Which statement is true about inorganic compounds? A. They are not made of atoms. B. They contain carbon. C. They are not made from living things. D. They are all elements.

Which domain do you find the most interesting why