Exam 24: Nonmetallic Elements and Their Compounds

Which two electron configurations represent elements that would have similar chemical properties? (1)1s²2s²2p⁴ (2)1s²2s²2p⁵ (3)[Ar]4s²3d¹⁰4p³ (4)[Ar]4s²3d¹⁰4p⁴

Which of these elements is most likely to exhibit an expanded octet in its compounds?

Nitrous oxide,N₂O,is

Name the three different classes (types)of hydride,and list some of their important characteristics.

The main commercial source of bromine is

What is the formal charge on the oxygen atom in N₂O (the atomic order is N-N-O)with a triple bond between the two N atoms and a single bond between N and O?

Which would exhibit characteristics of both a metal and a nonmetal?

Which of these substances is being considered as a replacement fuel for gasoline?

Which of these compounds does not follow the octet rule?

Silicon carbide is an important industrial chemical.Which of the following statements about silicon carbide is true?

What is the general electron configuration for atoms of all elements in Group 5A?

Sulfur hexafluoride,SF₆,is

Which of these choices is the electron configuration of a sulfide ion?

___________ ___________ are formed when molecular hydrogen combines directly with an alkali metal.

What element is the most abundant by mass in Earth's crust?

What is one chemical formula of the carbide ion?

Which of the following compounds is not a common phosphorus-containing oxoacid?

The presence of ozone in the upper atmosphere is important because

Hydrogen is placed at the top of Group 1A of the periodic table,so it must be a metal.

Identify by number (1A-8A)the main group of the periodic table to which the described element (X)belongs,in each of the following cases. a.X commonly forms the ion X^2-. b.X reacts with water according to the equation X(s)+ 2H₂O(l)→ X(OH)₂(aq)+ H₂(g) c.X exists as molecules,X₂; its hydride has the formula HX. d.X is a metal which reacts with oxygen to produce the peroxide,X₂O₂.