Which two elements most likely have the most similar properties?

beryllium and boron

scandium and silicon

nitrogen and phosphorus

hydrogen and helium

If each orbital can hold a maximum of two electrons, how many electrons can 2s hold?

In balancing chemical equations, what are the rules concerning coefficients and subscripts?

A jar of crunchy peanut butter contains 1.43kg of peanut butter. if you use 8.0% of the peanut butter for a sandwich, how many ounces of peanut butter did you take out of the container?

J. j thomson a british physicist was the first to identify the

What is the standard for comparison in an experiment called?

What is the average surface temperature of Uranus

Consider the following statements. A. Molecules of hot water have less kinetic energy than those of cold water. B. For most solids, solubility increases when temperature increases. C.

Which describes the fourth state of matter known as plasma? A It is a liquid containing nuclei and electrons. B It is a gas containing nuclei and electrons. C It is a liquid containing electrons created by fusion.

The process of using dna to produce complementary rna molecules is called

A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound? A. CaCl B. Ca0.9Cl1.8 C. CaCl2 D. Ca2Cl4