Ch 6 Practice Test Questions

Alkaline earth metals are NOT found in their free state in nature. Their electron configurations contain two outer electrons. Because they easily give up these two outer electrons, what type of bond do they typically form?

• covalent

• hydrogen

• ionic

• metallic

What is the chemical formula for ammonium hydroxide? Use your reference tables!

• NH₃OH

• NH₄OH

• NH₃(OH)₃

• NHOH₃

The alkali metal family of elements includes Li, Na, K, and Rb. These elements tend to easily form compounds with the halogens F, Cl, Br, and I. Which explains why they form compounds so easily?

• They have the same electron configuration as the halogens.

• They have one electron in their outer orbital which they readily lose.

• They have seven electrons in their outer orbital which they readily lose.

• They have one electron in their outer orbital which attracts the protons in the halogen atoms.

Based on its electron configuration, which element will MOST likely gain electrons from another element when forming an ionic compound?

• potassium (K)

• vanadium (V)

• iodine (I)

• xenon (Xe)

Compared with compounds such as sodium chloride, the wax produced by bees has a low boiling point. Which BEST explains this property of beeswax?

• It is a solid at room temperature.

• It has a crystalline ionic structure.

• It is composed of more than one element.

• It is made from covalently bonded compounds.

Sodium (Na) forms an ionic bond with Fluorine (F) to produce sodium fluoride (NaF). Which of these elements would bond similarly with sodium?

• potassium (K)

• magnesium (Mg)

• oxygen (O)

• chlorine (Cl)

Compounds can be classified as covalent or ionic by noting the location on the periodic table for each atom in the compound. Which compound is covalently bonded?

• sodium chloride (NaCl)

• sulfur dioxide (SO₂)

• potassium bromide (KBr)

• magnesium chloride (MgCl₂)

Nitrogen has five valence electrons. For this reason, it often bonds to gain three electrons. Based on the arrangement of the elements in the periodic table, which other element MOST likely shows similar behavior?

• neon

• carbon

• oxygen

• phosphorus

Elements with the same valence electron configuration can be expected to have similar

• atomic mass.

• chemical reactivity.

• numbers of protons.

• numbers of electrons.

The element cesium, Cs, is an alkali metal. Which chemical formula represents a cesium compound that is likely to exist?

• CsCl

• CsCl₂

• CsO

• CsO₂