The Periodic Table
Ionic Bonds
Covalent Bonds
Bonding in Metals
Vocab.
100
Magnesium chloride is an ionic compound with the chemical formula MgCl2. What does the “2” tell you?
There are 2 chloride molecules for each magnesium ion
100
When an atom loses an electron. It becomes a __________
positive ion
100
What is a triple bond?
3 pairs of electrons shared between two atoms.
100
The metal atoms in iron are held together by ________
Metallic bonds
100
Electrons involved in bonding between atoms are_______
valence electrons
200
List 2 elements from the group containing the most reactive metals.
Li, Na, K, Rb, Cs, Fr or Group 1
200
An ionic bond is the attraction between
oppositely charged ions.
200
When electrons are _____________ between two atoms, a covalent bond is formed.
shared
200
Name 3 properties of metals
shiny luster, malleability, ductility, electrical & thermal conductivity
200
A _________ bond is formed when two atoms share electrons unequally.
polar
300
In an electron dot diagram of Boron (B), how many dots should be drawn around the element’s symbol?
3
300
Ionic compounds are electrically __________
neutral
300
A low melting point is one property of ____________ compounds.
molecular
300
Positive metal ions surrounded by freely moving valence electrons best describes what?
a metal crystal
300
Bonds that form between two _____________ atoms usually are covalent bonds.
nonmetal
400
How many atoms of a Group 17 element would be needed to react with one atom of a Group 2 element?
2
400
Orderly crystal shapes, _______ melting points, and _________ conductivity when dissolved in water are properties of ionic compounds.
high, electrical
400
Fluorine (F2) is a(n) ____________________ molecule because the valence electrons are shared equally between the two fluorine atoms.
nonpolar
400
The properties of ___________ can be explained by the structure of and the bonding among the metal atoms.
solid metals
400
A mixture made of two or more elements, at least one of which is a metal is called a(n)
alloy
500
Which group contains elements with seven valence electrons?
Group 17
500
When ions having a positive charge form bonds with ions having a negative charge, the charge on the resulting compound is __________________.
zero or neutral
500
Because the electrons in a molecule of hydrogen fluoride (HF) are more strongly pulled toward the fluorine atom, the molecule is ____________________.
polar
500
A metal crystal consists of positively charged metal ions embedded in a “sea” of freely moving _______
valence electrons
500
Which of the following is a compounds have hard, brittle crystals?
ionic compounds
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