What is the term used to describe the number of protons plus the number of neutrons in an atom?

What is the name of the ionic compound AlBr3?

Which measurement, in seconds, shows the most bias? 4.9 ± 0.1 s 4.92 ± 0.01 s 5.01 ± 0.05 s 5.0 ± 0.5 s

Jeff's father is installing a do-it-yourself security system at his house. He needs to get a device from his workshop that converts electric energy to sound energy. Which device is Jeff's father looking for?

To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 2.2-L bulb, then filled it with the gas at 1.70 atm and 26.0 ∘C and weighed it again. The difference in mass was 4.3 g. Identify the gas.

Mgo (s) + h2o (ℓ) ←→ mg (oh) 2 (aq) if you remove mg (oh) 2 from the system, how will the system respond?

What is the formula of the most stable oxide of francium?

You just calculated that the heat of fusion for chloromethane is 6400 J/mol. The heat of fusion for hydrogen is 120 J/mol. Which of the following account for this difference? a. Hydrogen has stronger intermolecular forces than chloromethane. b.

Magnesium burns with a very bright light. When the flame goes out, a White powder is left behind. what is the word equation for this reaction.

Identify the types of intermolecular forces found for each of the liquids and relate these to the shape of the drop as seen from the side. Include the terms cohesive and adhesive forces properly in your explanations.

Which type of experiment follows ethical standards?