Chemistry mid term revision

Which of the following oxides is considered as acidic oxides ?

• aluminum oxide

• zinc oxide

• Calcium oxide

• Phosphorus oxide

In the same group, all of the following increases except for

• electron affinity

• Atomic volume

• mass number

• Atomic number

The number of electrons for the element vanadium V₂₃ in the 3d subshell is …………

• 7

• 3

• 8

• 9

The changing of iron ion Fe⁺² to Fe⁺³ is considered a

• Oxidation

• Reduction

• Excitation

• Ionization

The element that is in the second period and has 4 electrons p subshell with electrons in its atomic state is

• N₇

• O₈

• B₅

• S₁₆

The substance that ionizes according to the equation MOH→MOH +H⁺ is ………..

• organic acids

• alkalis

• Acids

• salts

Which of the following represents the electronic distribution of the iron cation in the compound Fe(OH)₂ (Note that the atomic number of iron Fe is 26)

• [Ar], 4S², 3d⁴

• [Ar], 4S¹, 3d⁶

• [Ar], 4S⁰, 3d⁵

• [Ar], 4S^0, 3d⁶

The atomic number of an element that has 10 filled orbitals is

• 20

• 32

• 22

• 23

Which of the following elements has the highest second ionization energy? ……..

• Be₄

• N₇

• Na₁₁

• S₁₆

In the following figure………….

• The attraction of O^-2 to H⁺ ion increases

• Ionization occurs and an acid is produced

• The attraction of O^-2 to the Na¹⁺ion increases

• The bond between Na¹⁺,O^-2 become stronger