How many electrons should be in an atom's valence shell (with the exception of hydrogen and helium) to become stable?

Hich of the following describes the sequence of events that most likely lead to the origin of life on Earth? Individual atoms combined to form simple molecules, which combined to make more complex molecules.

Which of the following statements is not supported by the plate tectonic theory? A. Continents move through the seafloor crust B. Locations of volcanoes and earthquakes can be explained. C.

What is the physical energy that stimulates sight? a. color b. light c. radiation d. vibration

All matter requires its own space. true or false

Why do we say that Neptune was the first planet to be discovered through the use of mathematics?

A climber pulls herself 8 meters upwards with a force of 150 Newtons. If it takes her 16 seconds to cover the 8 meters, how much power is she using? A. 40 W B. 55 W C. 70 W D. 75 W

How is volume calculated directly and indirectly

Which state of matter has the greatest amount of particle movement?

An engineer wishes to design a hydraulic system that will transmit pressure of 10,000 pascals using a force of 15 newton's how are large an area should the input piston have

What is the meaning of heredity