For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have?

A. 13

B. 14

C. 26

D. 27

E. 40

A portable television using a 12 volt, 3 Ah rechargeable battery can operate for a period of about 6 hours. What is the average current drawn in amperes during this period

How is tectonic plate motion related to earthquakes

While Sophie was driving to worl

To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. in one such episode, a 600 g falcon flying at 20.0 m/s ran into a 1.50 kg raven flying at 9.00 m/s.

What are the steps of mitosis

Which statement is true about planets with longer orbits in the solar system? A. They have longer periods of revolution. B. They are smaller in size. C. They have less distance to travel for one revolution. D. They have longer seasons

Atmospheric conditions near a mountain range are such that a cloud at an altitude of 2.00 km contains 3.20 ✕ 10^7 kg of water vapor. How long (in years) would it take for a 2.

In addition to the conditions required for any solar eclipse, what must also be true in order for you to observe a total solar eclipse?

Protons and neutrons strongly attract when they

How far is Jupiter from the sun?