Exam 7: Periodic Properties of the Elements

Hydrogen is unique among the elements because __________. 1. It has only one valence electron. 2. It is the only element that can emit an atomic spectrum. 3. Its electron is not at all shielded from its nucleus. 4. It is the lightest element. 5. It is the only element to exist at room temperature as a diatomic gas.

The electron configuration of the atom that is expected to have a positive electron affinity is __________.

In which set of elements would all members be expected to have very similar chemical properties?

When electrons are removed from a lithium atom they are removed first from which orbital?

Which of the following correctly represents the second ionization of aluminum?

Ca reacts with element X to form an ionic compound with the formula CaX. Al will react with X to form __________.

The noble gases were, until relatively recently, thought to be entirely unreactive. Experiments in the early 1960s showed that Xe could, in fact, form compounds with fluorine. The formation of compounds consisting of Xe is made possible by __________.

Consider the following properties of an element: (i)It is solid at room temperature. (ii)It easily forms an oxide when exposed to air. (iii)When it reacts with water, hydrogen gas evolves. (iv)It must be stored submerged in oil. Which element fits the above description the best?

Which alkaline earth metal will not react with liquid water or with steam?

All of the group VIA elements are solids except __________.

The list that correctly indicates the order of metallic character is __________.

Electrons in the 1s subshell are much closer to the nucleus in Ar than in He due to the larger __________ in Ar.

The electron configuration belonging to the atom with the highest second ionization energy is __________.

__________ is isoelectronic with argon and __________ is isoelectronic with neon.

Oxides of most nonmetals combine with water to form __________.

Which noble gas has the lowest first ionization energy?

Which one of the following compounds would produce an acidic solution when dissolved in water?

Which one of the following is not true about the alkali metals?

Element M reacts with oxygen to form an oxide with the formula MO. When MO is dissolved in water, the resulting solution is basic. Element M could be __________.

Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar?