Select the correct answer.

Which element is more reactive than rubidium (Rb) ?

A.

aluminum (Al)

B.

cesium (Cs)

C.

strontium (Sr)

D.

beryllium (Be)

Why is it impossible to know the exact speed and position of an electron

If a car is going at a speed of 36 km/hr. what is the speed in m/s

Why does the magnet disolves when is insert in hydrochloric acid

How is matter classified? chemical properties? physical properties? both a and b? none of the above?

Open-ended question: Differentiate between a solution and a two phase mixture. Brass is would be classified as which one of them? Which would you classify a salad as?

Limestone is primarily a crystal form of caco 3 . How many moles of oxygen are in a 1.25 mol sample of caco 3 ? Only include the numerical value in your answer. Do not include units.

The expression of 5522 km in scientific notation is

Gallium crystallizes in a primitive cubic unit cell. The length of an edge of this cube is 362 pm. What is the radius of a gallium atom?

Amy is holding one end of a jump rope. Her friend Beth is holding the other end of the rope. Amy swiftly moves the handle of the jump rope downward, creating a large wave in the rope. Will Beth feel a tug on the rope at her end?

Which is the balance equation for S8+O2=SO2