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Science test atoms and bonding
Terms in this set (42)
A chemical bond formed when two atoms share electrons is called a(n)
A mixture made of two or more elements, at least one of which is a metal is called a(n)
An ionic bond is the attraction between
oppositely charged ions
Describe a metal crystal
positive metal ions surrounded by freely moving valence electrons
Electrons involved in bonding between atoms are
In the chemical formula for an ionic compound, which items is written first
The name of the positive ion
Ionic compounds are electrically
Ions that are made of more than one atom are examples of
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
The chemical name for the compound with the formula Na2S is
What group contains the most reactive elements?
What is a double bond?
two pairs of electrons shared between two atoms
What term means that metals can be rolled into thin sheets, as in aluminum foil, or beaten into complex shapes?
When an atom gains an electron it becomes
Anion, a negative ion
When an atom loses an electron, it becomes
Cation, a positive ion
Which is a property shared by most molecular compounds?(list three)
Low melting point, los boiling point, does not conduct electricity when melted or dissolved
Which of the following is a property of ionic compounds?(list four)
High melting point,high boiling point, conduct electricity when melted or dissolved due to their charged particles, form hard, brittle crystals
Be and Al
Be and I
C and O
H and O
F and F
Na and Cl
Zn and Cu
Compound held together by the attraction for shared electrons
Compound held together by the electric attraction between oppositely charged ions
Higher relative melting point
Lower relative melting point
Occurs between metals and non-metals
Occurs between nonmetals
Shares valence electrons
Transfers valence electrons
List the seven diatomic elements using molecular formulas
A metal crystal consists of positively charged metal ions embedded in a "sea" of freely moving _________________________.
Because the electrons in a molecule of hydrogen fluoride (HF) are more strongly pulled toward the fluorine atom, the molecule is ____________________.
Bonds that form between two nonmetal atoms usually are ____________________ bonds.
Fluorine (F2) is a(n) ____________________ molecule because the valence electrons are shared equally between the two fluorine atoms.
Molecular compounds that dissolve in water do not conduct electricity because no _____ are present
Ionic compounds that dissolve in water conduct electricity because they break into ____ that move freely
Name the group of most reactive metals
Name the group of most reactive nonmetals
When ions having a positive charge form bonds with ions having a negative charge, the charge on the resulting compound is ____________________.
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