Mercury is in the 80th position in the periodic table. How many protons does it have?

Hubble law how did astronomers gather the information needed to establish the law?

The spreading of waves behind an aperture ismore for long wavelengths and less for short wavelengths. less for long wavelengths and more for short wavelengths. the same for long and short wavelengths. not discussed in this chapter.

What are 5 ways to conserve energy at school?

Where do most phosphates and nitrates in the Chesapeake Bay come from?

When does an element become a different element? A. when radiation is emitted B. only in the number of protons in the nucleus changes C. only when the number of electrons in the outer shell changes D. when number of neutrons in the nucleus decrease

A rectangular block has dimensions 2.9 cm x 3.5 cm x 10.0 cm. the mass of the block is 615.0 g. what is the volume and density of the block? (answer it with correct numbers of significant figures)

Which of the following are products of cellular respiration? Sunlight Oxygen ATP Water Carbon Dioxide

Do magnetic field lines ever start or end anywhere?

What effect do oceans have on the temperature of coastal areas? A. Ocean breezes warm the coastal land constantly. B. Ocean currents always cool a coastline. C. Ocean winds prevent extremes of temperature on coastal lands. D.

Vf=vi+at solve for t