Chemistry Final Exam
Al³⁺
Aluminum is a group 3A metal. Which ion does Al typically form?
a polyatomic anion with oxygen atoms
An -ate or -ite at the end of a compound name usually indicates that the compound contains...
cation on left, anion on right
How are chemical formulas of binary ionic compounds generally written?
Two atoms share two electrons
How do atoms achieve noble gas electron configuration's in single covalent bonds?
It gains electrons
How does oxygen obey the octet rule when reacting to form compounds?
C) 3
How many electrons does nitrogen gain in order to achieve noblegas electron config? A) 1 B) 2 C) 3 D) 4
B) 4
How many valence electrons are in a silicon atom? A) 2 B) 4 C) 6 D) 8
A) 2
How many valence electrons are in an atom of magnesium? A) 2 B) 3 C) 4 D) 5
D) 5
How many valence electrons are in an atom of phosphorus? A) 2 B) 3 C) 4 D) 5
A) 2
How many valence electrons does a helium atom have? A)2 B) 3 C) 4 D) 5
Solid
Ionic compounds are normally in which physical state at room temperature?
The formula HCN indicates that a molecule of hydrogen cyanide contains one hydrogen atom, one carbon atom, and one nitrogen atom
The molecular formula for the compound hydrogen cyanide is HCN. What information does the molecular formula provide that hydrogen cyanide?
The number and kind of atoms present in a molecule
What information does a molecular formula provide?
1+
What is the charge on the cation in the ionic compound sodium sulfide?
P3-
What is the formula of the ion formed when phosphorus achieves a noblegas electron config A) P3+ B) P2+ C) P2- D) P3-
B) valence electrons
What is the name of the electrons in the highest occupied energy level of an atom? A) orbital electrons B) valence electrons C) anions D) cations
A molecule
What is the representative unit in a molecular compound?
lose two electrons
When group 2A elements form ions, they...
roman numeral following the name
When naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge is indicated by a...
Hydrogen and the halogens only
Which atoms can form diatomic molecules joined by a single covalent bond?
F
Which of the following atom requires most negative charge in a bond with hydrogen?
Mn2O3
Which of the following compounds contains the Mn 3+ ion?
H-F
Which of the following covalent bonds is the most polar?
Nitrogen
Which of the following elements can form diatomic molecules held together by triple covalent bonds?
A) fluorine
Which of the following elements forms an ion with a charge of 1-? A) flourine B) hyrdrogen C) potassium D) sodium
Only two elements
Which of the following is a cation?
A) oppositely charged ions attract
Which of the following occurs in an ionic bond? A) oppositely charged ions attract B) 2 atoms share 2 electrons C) 2 atoms share more than 2 electrons D) like charged ions attract
To attain a noble gas electron configuration
Why do atoms share electrons in covalent bonds?
nitride ion
what is the correct name for the N³⁻ ion?
anions
what type of ions have names ending in -ide?
they are composed of anions and cations
which of the following is true about the composition of ionic compounds?