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Terms in this set (40)
Property shared by most molecular compounds is
low melting point
When an atom looses an electron, it becomes
Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the 2 tell you?
2 bromide ions for every magnesium ion
In the chemical formula for an ionic compound, which item is written first?
the name of the positive ion
What is the chemical name for the compund with the formula Na2S?
What is a double bond?
two pairs of e- shared between two atoms
Electrons involved in bonding between atoms are
A mixture made of two or more elements, at least one of which is a metal is callend a(n)
Metals can be rolled into thin sheets is called
Most reactive elements are group ___, the ______ _______.
group 1, the alkali metals
Ionic compounds have
hard, brittle crystals
An ionic bond is the attraction between
oppositely charged ions
Ions that are made of more than one atom are examples of
A chemical bond formed when two atoms are sharing electrons is called a
What describes a metal crystal?
positive metal ions surrounded by freely moving valience electrons
Ionic compounds are electrically ______.
The properties of solid materials can be explained by the _______ of and the bonding among the metal atoms.
When electrons are _____ between two atoms, a covalent bond is formed.
A ______ bond is formed when two atoms share electrons unequally.
A low melting point is one property of ________ compounds.
________ compounds are orderly crystal shapes, high melting points and electrical conductivity when dissolved in water.
Ionic compounds that dissolve in water conduct electricity because they break into _____ that move freely.
When ions having a positive charge form bonds with ions having a negative charge. the charge on the resulting compound is ________.
Bonds that form between two nonmetal atoms usually are _______ bonds.
Flourine (F2) is a(n) ______ molecule because the valence electrons are shared equally between the two flourine atoms.
Solid metals are good conductors of heat and _________.
Molecular compounds that dissolve in water do not conduct electricity because no _____ are present.
Because the electrons in a molecule of hydrogen flouride (HF) are more strongly pulled toward the flourine atom, the molecule is _______.
A metal crystal consists of positively charged metal ions embedded in a "sea" of freely moving _______ _________.
Most reactive nonmetals are _______.
Group 13, how many dots are drawn around any symbol to make a dot diagram?
Which group of elements contains 2 valence electrons?
How many atoms of a Group 17 element would be needed to react with one atom of a Group 2 element?
two atoms of elements in Group 17 form ions with a charge of -1
Which group has 2 valence electrons?
How do valence electrons relate to chemical reactions of any element?
valence electrons are the electrons most loosely held by an atom and the ones involved in chemical reactions
What kind of bond forms between metal and nonmetal?
What kind of bond forms between nonmetal and nonmetal?
Compare Ionic bond and covalent bond
ionic bond - 2 atoms transfer valence electrons, high melting point and conducts electricity
covalent bond - 2 atoms SHARE valence electrons, low melting point, doesn't conduct electricity
Why are metals good conductors of heat and electricity?
a metal crystal consists of + charged metal ions embedded in a "sea" of loosely held valence e- that can move easily. Heat travels through material
What is the difference between polar and nonpolar?
When 2 atoms form a covalent bond, electrons are shared between them. If the atoms are different, one atom may pull more strongly on the shared electrons so that the electrons are shared unequally. This difference results in a bond that is slightly negative at one end and slightly positive at the other end. This unequal sharing of electrons is known as a polar bond.
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