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CBS SCIENCE EXAM CH. 4
Terms in this set (37)
What is an ion
an atom or group of atoms that has become electrically charged
when an atom loses an electron it becomes a
when an electron is transferred from a sodium atom to a chlorine atom, the chlorine atom become
a negative ion
an ionic bond is the attraction between
oppositely charged ions
an ionic bond is formed when
electrons are transferred
ionic compounds are electrically
how many chloride ions are needed to cancel the 2+ charge of magnesium in magnesium chloride (MgCl2)
ions that are made of more than one atom are examples of
what is the chemical name for the compound with the formula Na2S?
the ionic compound MgO is called
which of the following is NOT a characteristic property of ionic compounds?
they have low melting points
what are the characteristics of ionic compounds?
they have HIGH melting points
they form crystals
they conduct electricity when dissolved in water
in what form can an ionic compound conduct electricity?
when dissolved in water
the ions in an ionic compound form regular patterns because
every ion is attracted to ions near it with an opposite charge
a chemical bond that forms when two atoms share electrons is called
bonds that form between two nonmetals are usually
what is the formula to find mass
what is ta double bond
two pairs of electrons shared between two atoms
how many pairs of electrons are shared in a triple bond?
a molecular compound consists of
oppositely charged particles
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
what is the name of the compound CuOH
what is the name of the compound Mn3(P04)2?
how many total atoms are in the compound Mn3(P04)2?
electrons in a nonpolar covalent bond are shared
what is the name of this compound K2CO3??
what is the total number of atoms in this compound K2CO3?
what is the name of the compound PbSO3?
is pure water a good conductor of electricity?
the attractions between polar molecules are weaker than those between nonpolar molecules? T or F
Atoms that form covalent bonds can never what
develop a charge
molecular compounds cannot form what
how many neutrons are in zirconium - 94?
how many neutrons are in rhodium - 103?
Explain how soap is useful when washing grease or oil from your clothes. Make sure to include polar and nonpolar bonds in your answer.
the soap is useful because it is polar at the top and nonpolar at the bottom and the grease is nonpolar. So grease and the nonpolar side of the soap stay together. The polar side and water stay together when you rinse your clothes.
list the 3 properties of ionic compounds. Also list two properties of molecular compounds and explain why they are different from the properties of ionic compounds?
crystal structure, melting point, and electrical conductivity.
molecular compounds are poor conductors of electricity no charged particles are available to move and lower melting point because less heat is needed to separate molecules.
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