What is the relative charge carried by an electron

The number of protons plus neutrons in the atom is called its?

What is the stable ion of beryllium.

2al (s) + 3cl2 (g) →2alcl3 (s) δh∘ = - 1408.4 kj. how much heat (in kilojoules) is released on reaction of 4.70 g of al?

Two 20.0-g ice cubes at - 20.0 °c are placed into 205 g of water at 25.0 °c. assuming no energy is transferred to or from the surroundings, calculate the final temperature, tf, of the water after all the ice melts.

Which interactions and processes contribute to the dissolution of ionic compounds in water? Check all that apply. a. Hydrationb. Affinity of oxygen towards cationsc. Ion-dipole interactionsd. Hydrogen bondinge. Affinity of hydrogen towards anionsf.

When light from the sun warms the ground, the transfer of heat energy is called A) conduction. B) power. C) radiation. D) reflection.

What is alkyl hydrogen sulphate

What is the physical state of each of these materials at room temperature? a. gold b. gasoline c. oxygen d. neon e. olive oil f. sulfur g. mercury

What is one unexpected problem associated with cell phone use? A. It decreases the efficacy of your peripheral vision. B. It distracts your hearing from events on the roadway. C. It causes you to misjudge distances.

Construction crews sometimes use this reaction for welding underwater structures: Fe2O3 + 2Al → Al2O3 + 2Fe How many moles of iron (Fe) would be produced if 2.