The number of valence electrons in an atom that has an atomic number of 13 is

Which contains more thermal energy: an ice cube or an iceberg?

Avogradoa number was calculated by determining the number of atoms in?

Why do solids have a fixed shape and fixed volumes?

Calculate the mass defect of the nitrogen nucleus 14 7n. the mass mn of neutral 14 7n is equal to 14.003074 atomic mass units.

A sample of ideal gas is in a sealed container. The pressure of the gas is 565 torr torr, and the temperature is 3 ∘C∘C.

Which of the answer choices best describes how electrons move, according to modern atomic theory? They vibrate in place. They move like planets. They move in orbitals. They slide past each other.

The total solute concentration of a red blood cell is about 2%. Sucrose cannot pass through a red blood cell's plasma membrane, but water and urea can. Which of the following solutions will cause a red blood cell to shrink? a.

A geologist discovered fossils of marine animals in a layer of sedimentary rock in the desert. Based on this discovery, what conclusion can the geologist draw?

How do metals form chemical bonds with other metals?

Maple syrup has a density of 1.325 g/ml, and 100.00 g of maple syrup contains 67 mg of calcium in the form of ca2 + ions. what is the molarity of calcium in maple syrup?