Calcium sulfide forms when calcium loses 2 valence electrons to sulfur. What type of a bond is formed?

Select one of the options below as your answer:

A) covalent

B) ionic

What must be true of a disproportionate substance? It is composed of oxygen. It is both a reactant and a product. It has an oxidation number of 0. It gains and loses electrons.

How many moles of ions are in 285 ml of 0.0150 m mgcl2?

Which two processes are at equilibrium in a saturated sugar solution? Select one: a. evaporation and condensation b. dissolving and crystallization c. decomposition and synthesis d. ionization and recombination

What is the pH of 0.0001 M NaOH

What is the basic building block of a nucleic acids?

Define and explain bond energy.

A colorless, toxic, radioactive gas is called what

Making observations is the first step in the scientific method. Why don't scientists stop with the first step when creating an experiment? A.

Brass is an example of

A molecule has four bonded atoms around a central atom. The central atom does not have any lone pairs of electrons. What is the geometry of the molecule? Bent Linear Trigonal planar Tetrahedral