Astronauts brought back 500 lb rock samples from the moon. how many kilograms did they bring back (1 kg = 2.20 lbs)

How would you explain the difference between an element and an atom?

Radium decays to form radon. Which equation correctly describes this decay?

How are concentration, temperature, surface area, stirring/shaking/agitating, and catalyst/preservative manipulated to speed up AND slow down reactions?

Mass is: measured in kilograms measured using a scale affected by gravity all of the above

Who said atoms are neither created nor destroyed in chemical reactions?

Which state of matter isn't typically found on earth?

Both black and white road surfaces absorb sunlight. the warmer road surface at the end of a sunny day is the

Which information in the periodic table indicates the number of protons in an atom? A. the position of the element in its column B. the element's chemical symbol C. the element's atomic mass D. the element's atomic number

What were the expected results of Rutherford's gold foil experiment, based on Thomson's model of the atom? How did the real results of the gold foil experiment change the accepted model of the atom?

How many neutrons are in titanium