Which of the following groups of elements are in the main group?

A. Alkali metals

B. Halogens

C. Nonmetals

D. Transition elements

Choose the law each sentence describes. 1. This law relates a planet's orbital period and its average distance to the Sun. a. Keplers first law b. Keplers second law c. Keplers third law 2.

What is in the boron family with 3 valence electrons

How can the direction of the electric field created by an electron be correctly described?

What force is required to accelerate a 10 kg mass at 5m/sec^2

In a bumper car arena, two cars of equal mass are heading straight toward each other. The orange one is traveling at a speed of 5 meters per second. The green one is traveling at a speed of 2 meters per second.

The liquid contained in batteries that conducts electric charge is called the: solution, electrolyte, suspension, colloid

Which term describes the second personality seen in a person with dissociative identity disorder (DID) ? A. ego B. superego C. alter ego D. id

What happens to the partiles of a soild as it becomes a liquid

How was the gravitational constant G first determined

There is an explosion on the surface of a lake and two people John and Nil hear its sound. John is 150m away on a boat and Nil is 150m below the surface of water. Who would hear the sound first and why?