The element magnesium has 2 valence electrons. What is the most likely charge on a magnesium ion?

What two aspects of a force do scientists measure? A. Position and Size B. Size and Stability C. Magnitude and Direction D. Strength and Magnitude

8. If the speed of a wave is 1500 m/s and its frequency is 200 Hz, what is the wavelength?

Why do planets orbit the sun (why don't they crash into the sun) ?

Express 1010 miners in examiners. Answer in units of Eminer.

What causes an ion to have a net negative charge

When a brick is dropped from the roof of a house, it lands on the ground with a speed v. What will the speed at ground level be for an identical brick dropped from a roof twice as high as the first one?

The scientific method begins with recognizing a problem. The recognized problem in this scenario is, "Why is the printer in the office not working?" Choose the hypotheses that are testable and from which an experiment can be formed.

The correctly balanced equation for H2O2 → H2O + O2 is

How would an unbalanced chemical equation convey misleading information about what took place during a chemical reaction?

A car rounds a 75-m radius curve at a constant speed of 18 m/s. a ball is suspended by a string from the ceiling the car and moves with the car. the angle between the string and the vertical is: