How many valence electrons are there in silicon, which has an atomic number of 14?

a. 2

b. 4

c. 6

d. 8

Which mineral property can be determined simply by observation

The molecules of Any Given substance are always

For each set of elements represented in this periodic table outline, identify the principal quantum number, n, and the azimuthal quantum number, ℓ, for the highest energy electrons in an atom of one of those elements

A measure of the amount of light received on Earth is a star's?

Which of the following is an exothermic reaction? A. dissolving ammonium nitrate in water to cool the water B. condensation C. melting ice D. dissolving sugar in water

Which statement best compares the energy involved in melting with the energy involved in boiling for a given liquid?

Which statement best describes John Dalton's use of creativity in his work? A. He reinterpreted and retested Joseph Proust's results. B. He used a scientific method to conduct his experiment. C.

How does planks constant work

What is true of the total mass of reactants compared to the total mass of proucts

An aqueous solution is 36% by mass silver nitrate, AgNO3, and has a density of 1.41 g/mL. What is the molality of silver nitrate in the solution?