For which blocks of elements are outer electrons the same as valence electrons? For which are d electrons often included among valence electrons?

When 2.94 g of a metal combined with fluorine gas, 7.47 g of a metal fluoride formed. Given this information, calculate the mass %F in the metal fluoride that formed.

Match the substance with its chemical formula. 1. H + hydroxide ion 2. H3O + hydronium ion 3. OH - hydrogen ion

How might Rebecca Flowers have felt when she found new evidence about the Grand Canyon. Cite an example from the text to support your answer.

Which is true for a substance that releases energy? A) The energy release decreases the molecular motion and the kinetic energy of the substance. B) The energy release decreases the molecular motion but increases the kinetic energy of the substance.

An 8 N force is applied to a 2 kg object. What is the magnitude of the object's acceleration? A. 0.25 m/s² B. 4 m/s² C. 6 m/s² D. 16 m/s²

Why does a solution of a weak base and its conjugate acid act as a better buffer than does a solution?

Describe the different abiotic and biotic parts of an ecosystem. Identify and explain what organisms lie on each of the trophic levels.

Concentration measurements provide a quantitative measurement of the amount of solute that is dissolved in a given amount of solvent. True or false?

What type of bond will be formed for atoms that have a + 1 or - 1 charge?

Why a neutron is important