Explain, in terms of electrons, why the radius of a potassium atom is larger than the radius of a potassium ion in the ground state.

A dark grey rock has a mass of 80 grams. When dropped in water, it makes the water level rise from 70 mL to 90 mL. What is the density of the rock?

A laboratory experiment reauires 2.0L

What happens to the air pressure inside a balloon when the balloon is squeezed? A. The air pressure fluctuates randomly. B. The air pressure remains constant. C. The air pressure decreases. D. The air pressure increases.

Witch statement describes the periodic law?

A compound that can act as an acid or a base is referred to as

Name the two sub-atomic particles in the nucleus of an aluminium atom.

Identify the true statement. Choose one: A. The expansion of ice sheets at the end of the Pleistocene caused glacial rebound in northern Canada. B. Regions covered by glacial ice are termed periglacial environments. C.

What is the concentration when 0.065 moles of NaNO3 are dissolved in enough water to make 150.0 mL of solution?

What are the reactants and products of cellular respiration and photosynthesis?

Which situation would probably NOT result in the formation of new species? A) The introduction of a predatory fish that only eats the largest native bass in a Georgia lake.