Upgrade to remove ads
Physical Science Fall Exam
Terms in this set (73)
Electrons involved in bonding between atoms are
Each family in the periodic table has its own characteristic properties based on the number of
What is the greatest number of valence electrons an atom can have?
If atoms of a halogen non metal (Group 17) gain one electron, the atoms then have
8 valence electrons
When an atom loses an electron, it becomes a
An ionic bond is the attraction between
oppositely charged ions
Ions that are made of more than one atom are examples of
Ionic compounds are electrically
Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the "2" tell you?
There are two bromide ions for every magnesium ion
What is the chemical name for the compound with the formula Na2S?
In the chemical formula for an ionic compound, which item is written first?
Which of the following is a characteristic property of ionic compounds?
They form hard, brittle crystals with characteristic shapes.
In what form can an ionic compound conduct electricity?
when dissolved in water
A chemical bond formed when two atoms share electrons is called a(n)
What is a double bond?
two pairs of electrons shared between two atoms
Which is a property shared by most molecular compounds?
low melting point
Molecular compounds do not conduct electricity because they
do not break into ions
A covalent bond in which electrons are shared unequally is
Molecules that contain two polar bonds are
Water is polar and oil is nonpolar. What happens when the two liquids are poured into the same container?
the liquids do not mix
A mixture that is made of two or more elements—one that is a metal—that has the properties of metal is a(n)
What is an advantage that alloys might have over many pure metals?
alloys resist rust
Steel is an alloy of one or more elements combined with
Which of the following properties is NOT characteristic of steel?
reacts readily with air
Brass and steel are examples of
What strong alloy, containing carbon, iron, and another metal like chromium or nickel, is used to make construction equipment, bicycle frames, and train rails?
Which of the following best describes a metal crystal?
positive metal ions surrounded by freely moving valence electrons
The attraction between a positive metal ion and the electrons surrounding it is a(n)
Which of the following terms means that metals can be rolled into thin sheets, as in aluminum foil, or beaten into complex shapes?
Which of the following terms means that metals can be pulled into thin strands or wires?
T/F The valence electrons are those electrons most tightly held by the atom.
T/F Each family in the periodic table has its own characteristic properties based upon its number of valence electrons.
T/F When an atom gains an electron it becomes a positive ion.
T/F The attraction between a positive ion and a negative ion results in a covalent bond.
T/F Orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water are properties of ionic compounds.
T/F When electrons are transferred between two atoms, a covalent bond is formed.
T/F Low melting points and lack of electrical conductivity are properties of molecular compounds.
T/F A nonpolar bond is formed when two atoms share electrons unequally.
T/F In every alloy, at least one of the components is a(n) metal.
T/F Steel is an alloy of iron with carbon, nickel, and other elements.
Chemical bonds form when valence electrons are ____________________ between atoms.
A neutral atom never has more than ____________________ valence electrons.
In the periodic table, atoms are arranged from left to right and from top to bottom in order of increasing _________________________.
With the exception of helium, Group 18 elements usually have _____________ valence electrons, so they do not usually react with other elements.
Elements in Group 17 (the halogens) are the ____________________ reactive nonmetals.
Nitrate (NO3-), ammonium (NH4+), and carbonate (CO32-) are examples of ____________________ ions.
When ions having a positive charge form bonds with ions having a negative charge, the charge on the resulting compound is ______ ______________.
Elements in Group 1 lose one electron to form ions with a(n) ______________ charge.
When an ionic compound forms, the total number of positive charges and the total number of negative charges must be ____________________.
Ionic compounds that dissolve in water conduct electricity because they break into ____________________ that move freely.
Ionic compounds have ____________ melting points because a lot of energy is needed to break the bonds between the ions.
Bonds that form between two nonmetal atoms usually are ___________________ bonds.
In a double covalent bond, ____________________ electrons are shared between two atoms.
Molecular compounds that dissolve in water do not conduct electricity because no _________________________ are present.
A(n) ____________________ compound is a compound that consists of molecules made of atoms that are covalently bonded.
Fluorine (F2) is a(n) ____________________ molecule because the valence electrons are shared equally between the two fluorine atoms.
Because the electrons in a molecule of hydrogen fluoride (HF) are more strongly pulled toward the fluorine atom, the molecule is ____________________.
Many ____________________ are made by melting metals and mixing them together in carefully measured amounts.
A metal crystal consists of positively charged metal ions embedded in a "sea" of freely moving _________________________ electrons.
Solid metals are good conductors of heat and ____________________.
List three elements from the group containing the most reactive nonmetals.
Fluorine, Chlorine, Bromine, and Iodine
In each period, how does the number of electrons in each kind of atom change from left to right between Groups 1 and 2? Explain how you know.
Group one has 1 valence electron and Group 2 has 2 valence electrons because the number of valence electrons increasing from each group.
In an electron dot diagram of aluminum (Al), how many dots should be drawn around the element's symbol? Why?
Three because it's in group 13, which has three valence electrons.
Which group of elements loses electrons most easily?
Which group contains elements with two valence electrons?
Alkaline earth metals
How many atoms of a Group 17 element would be needed to react with one atom of a Group 2 element? Explain.
It takes 2 atoms of group 17 with one atom of group 2.
What is the charge for a lithium ion?
What is the symbol for a calcium ion?
What is the name of the ion with the chemical formula NO3-?
What is the chemical formula of the compound that forms when sodium and chloride combine?
What is the chemical name for CaCO3?
How do valence electrons relate to the chemical reactions of an element?
Valence electrons are held loosely in chemical reactions and bonds are formed by how many of these ve's are shared.
Explain what makes the Group 1 elements the most reactive metals.
They react highly with water and air
Sets found in the same folder
Chapter 18 Test Questions
Science test atoms and bonding
Sets with similar terms
Science Exam: Chemical Bonding
Other sets by this creator
Cons. Ed Chapter 1-5 Key Terms
Sports Marketing Final Exam Review
Foods I Final Exam Review
ch 4 terms stats
Other Quizlet sets
Physical science retake fill in blank
Chapter 7 Pearson Review
Biology Chapter 2
STUDY GUIDE CHAPTER 2 THE CHEMICAL LEVEL OF ORGANI…