Exam 22: The Main-Group Elements

In the following pictures representing binary hydrides AH_x,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A. -The binary hydride shown in picture (3)is classified as

-What is the likely formula for the binary compound formed from the elements represented by letters B and D on the periodic table above?

The following pictures represent binary hydrides,AH_x,where A = Na,Ti,C,or Cl.Lightly-shaded spheres represent H atoms or ions and darkly-colored spheres represent atoms or ions of element A. -Which hydride has the lowest melting point?

Fullerene is an ________ of carbon.

The following pictures represent binary hydrides,AH_x,where A = Na,Ti,C,or Cl.Lightly-shaded spheres represent H atoms or ions and darkly-colored spheres represent atoms or ions of element A. -Which hydride reacts with water at 25°C to give H₂ gas and forms a basic solution?

Mica cleaves into thin sheets because at the molecular level its structure is

Which is not true about elemental oxygen?

The elements indicated by the shaded area in the following periodic table are all

Which compound has carbon with a negative oxidation number?

What statement is not representative of the chemistry of H₂S?

Which element of group 4A has the highest melting point?

Which element of group 4A has the greatest electronegativity?

Carbon is the ________ most abundant element by mass in living organisms.

Calcium,strontium,and barium are all prepared commercially by the same method which is

Adenosine triphosphate (ATP)plays an important role in energy transfer within cells.ATP can be considered to be an ester of triphosphoric acid,which is formed by the combination of three phosphoric acid molecules with the elimination of two water molecules.What is the formula of triphosphoric acid?

Each of the pictures (a)-(d)represents one of the following substances at 25°C: potassium,fluorine,iodine,potassium fluoride,not necessarily in that order. -Which picture corresponds to fluorine?

What are the common oxidation states of the Group 3A elements Al and Tl?

What is the most acidic oxide of phosphorus?

Elements in group 3A of the periodic table have the valence electron configuration ________.

Both chlorine and bromine can be produced in the laboratory by reacting the halides with manganese(IV)oxide.If the following equation is balanced in an acidic solution,then the MnO₂ is acting as a(n)________ and the coefficient in front of H⁺ is ________. ________ MnO₂(s)+ ________ Cl^-(aq)+ ________ H⁺(aq)→ ________ Mn²⁺(aq)+ ________ Cl₂(g)+ ________ H₂O(l)