Which subatomic particle has the least mass?

1. electron

2. proton

3. neutron

4. nucleus

Are soft drink, solder and air homogeneous or heterogeneous?

Air has 21% oxygen by volume. Oxygen has a density of 1.31 g/L. What is the volume in liters of a room that holds enough air to contain 55 kg of oxygen

Which statement accurately describes temperature? 0 Temperature is the kinetic energy of the molecules in a substance. Temperature is a measure of the average kinetic energy of the molecules in a substance.

Explain endothermic reaction?

Neutralization is a reaction between a (n) a. acid and a base. b. acid and a metal. c. base and a salt. d. salt and water.

How do earthquakes happen? A. Because of a release of pressure from plate movement B. Only because of a volcanic eruption C. Because of motion of ocean waves D. Only because of a lack of pressure between plates

What happens when two objects made out of different materials are rubbed together? Subject: Electricity

In a redox reaction, which ion would you expect to be more easily reduced? In a redox reaction, which ion would you expect to be more easily reduced? Hypochlorite ion, ClO - They are equally reducible. Not enough information is given.

Which is the most important factor in determining the state of a substance? the size of the atoms in a substance the number of molecules in a substance the position of the electrons on the outer valence shells the balance between intermolecular

What happens when Potassium (K) forms and ion? A. It gains an electron <- - I believe this is correct. B. It loses an electron C. It shares and electron with a nonmetal D. It shares and electron with a metal