Which two particles have opposite charges?

(1) an electron and a neutron

(2) an electron and a proton

(3) a proton and a neutron

(4) a proton and a positron

12. Describe the results of a chemical change. List four indicators of chemical change.

What is one benefit of a comparative investigation?

What has law is in use when you place dry ice into a balloon

Which is an example of a voltaic cell? A. a battery B. electrolysis of water C. electroplating of chrome D. a rechargeable battery

What is the mole ratio of butane to carbon dioxide?

What mass of H2SO4 is contained in 60.00 mL of a 5.85 M solution of sulfuric acid

One isotope has 6 protons and 8 neutrons which reference names this isotope

When an atom that has no charge loses two electrons, it becomes a: A: positive ion. B: negative ion. C: positive isotope. D: negative isotope.

A 155.0 9 piece of copper at 182 °C Is dropped into 2500 g of water at 23.9 °C. (The specific heat of copper is 0.385 1/9°C.) Calculate the final temperature of the mixture. (Assume no heat loss to the surroundings.)

Which state of matter is characterized by having an indefinite shape, but a definite volume? Gas Liquid Solid None of the above