Periodic Table
Properties shared by most molecular compounds
What is low melting point, low boiling point, weaker bonds
An atom that has either lost, or gained, an electron.
What is an ion?
Two pairs of electrons shared between two atoms
What is a double bond?
Statement that best describes a metal solid.
What are positive metal ions surrounded by freely moving valence electrons?
A __ bond is formed when two atoms share electrons unequally.
What is a nonpolar bond?
The following group contains the most reactive elements (farthest left).
What are alkali metals?
Written first in the chemical formula for an ionic compound.
What is the name of the positive ion?
Molecular compounds that dissolve in water do not conduct electricity because no __ __ are present.
What are charged particles?
Solid metals are good conductors of heat and _.
What is electricity?
Electrons involved in bonding between atoms.
What are valence electrons?
The chemical name for the compound with the formula Na2S.
What is sodium sulfide?
Properties of ionic compounds.
What is forming hard, brittle crystals, and high melting points?
In a nitrogen molecule, the two nitrogen atoms share three pairs of electrons, forming a __ __.
What is a tripple bond?
The properties of solid metals can be explained by the __ of and the bonding among the metal atoms.
What is structure?
A mixture made of two or more elements, at least one of which is a metal.
What is an alloy?
An atom’s valence electrons are those electrons that have the * (highest or lowest) * energy.
What is highest energy?
Ionic compounds that dissolve in water conduct electricity because they break into _ that move freely.
What are ions?
Because the electrons in a molecule of hydrogen fluoride (HF) are more strongly pulled toward the fluorine atom, the molecule is _.
What is polar?
Terms that means metals can be rolled into thin sheets, as in aluminum foil, or beaten into complex shapes.
What is malleable?
A low melting point is one property of __ compounds.
Within each * (period or group) * in the periodic table, elements have similar properties because they have the same number of valence electrons.
What is group?
Orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water are properties of __ compounds.
What are ionic compounds?
When electrons are __ between two atoms, a covalent bond is formed.
What is shared?
The metal fins that cool a motorcycle’s engine make use of the high __ conductivity of metals.
What is thermal?
Water is polar and oil is nonpolar. This happens when the two liquids are poured into the same container.
What is the liquids DO NOT mix?