What period are the following elements in He, Ge, Rb, l

What statements applies to the horizontal rows or periods in the periodic table?

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

How does the volume of a gas compare to the space between the particles of a gas is at normal pressure?

Water wheels convert the kinetic energy of moving water into which form? A. potential energy B. chemical energy C. gravitational energy D. mechanical energy

Which formula equation shows a reversible reaction? a. 2Na+F2-> 2NaF b. CaCO3-> CaO+CO2 c. NH4CI (s) - -NH3 ( g.+HCI ( g. 2H2O2 (aq) - pt-> 2H2O (I) + O2 (g)

What are two reasons that ocean water sinks in the Arctic Ocean? A. The surface water is warmer and less salty than normal. B. The surface water is warmer and more salty than normal. C. The surface water is colder and less salty than normal. D.

Which statement best describes the conductivity of weak electrolytes, such as weak acids and bases? A) Weak electrolytes do not dissolve in water and can not conduct electricity.

Two speakers are placed side by side and are described as having constructive interference. How do you know when constructive interference of sound waves has occurred?

Write about "human impact"

The structural level of a protein least affected by a disruption in hydrogen bonding is the