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Chapter 5 Combining Atoms and Molecules

A ___ is a pure substance that contains two or more elements. compound
A ___ ___ is an ingredient list for a compound that uses atomic symbols andsubscripts. chemical formula
A neutral particle that forms as a result of electron sharing is a ___. molecule
Compounds have properties that are different from the ___ that compose them. elements
Table salt is formed when the elements ___ and ___ combine. sodium, chlorine
An ionic bond is an electrical attraction between ___ and ___ charged ions in an ionic compound positively, negatively
An atom that is not neutral because it has gained or lost electrons is an ___. ion
The force that holds atoms together in a compound is called a ___ ___. chemical bond
An ___ ___ is an electrical attraction between positively and negatively charged ions in an ionic compound. ionic bond
An ___ compound is one in which two or more elements or compounds gain or loseelectrons and form ionic bonds. ionic
In an ionic compound, the positive ion is usually a ___. The negative ion is a ___-___. metal, non-metal
If an ionic compound has only two different ions, it is called a ___ ___. binary compound
Metals like magnesium and calcium from Group 2 of the periodic table can form binaryionic compounds with elements from either Group ___ or Group ___. 16, 17
Many ionic compounds dissolve in water. Water with dissolved ionic compounds is a ___ ___ of electricity. good conductor
___ ___ ___ are one method for using atomic symbols and dots representing electrons to help predict how compounds will form. Lewis dot diagrams
The number of electrons in an atom’s outermost energy level is its ___. valence
The noble gases, elements from ___ ___ of the periodic table, have eight valence electrons. Group 18
Some atoms become ions by gaining or losing electrons until they have the same filled___ (or valence) energy levels as noble gases. outer
A ___ ___ is a chemical bond formed when atoms share electrons. covalent bond
All ___ ___ are covalent compounds based on carbon atoms. organic compounds
___ compounds can be solids, liquids, or gases at room temperature. Covalent
Atoms that have ___ electrons can form compounds if they share electrons. unpaired
Carbon has ___ unpaired electrons, and can therefore form four covalent bonds. four
A ___ ___ consists of two pairs of electrons shared between the same two atoms. Double bonds are stronger than single bonds. double bond
___ ___ are stronger than single or double bonds and share three pairs of electrons. Triple bonds
___ make up about two-thirds of the elements and have many useful properties. Metals
Metals are good ___ of heat and electricity because their electrons are free to move. conductors
Metals have a ___ melting point and a ___ boiling point. high, high
___ is the ability of a material, like metal, to be hammered or rolled into sheets. Malleability
___ is the ability of a substance to be pulled into wires. Ductility
___ (or Molecules) of metal in solids pack together as closely as possible in a regular, three dimensional pattern. Atoms
A ___ ___ is a bond formed when many metal atoms share their pooled electrons. metallic bond
Metal atoms combine in regular patterns in which some ___ are free to move from atom to atom. electrons
In a metal, individual atoms lose electrons to become positive ___. ions
Crystals are regular, repeating arrangements of atoms, ions, or ___. molecules
Crystals can be held together by metallic, ___, or covalent bonds. ionic
A ___ ___ is the smallest repeating pattern that shows how the atoms, ions, or molecules are arranged in a crystal. unit cell
One common crystal is table salt, also known as ___ ___. sodium chloride
Sodium chloride, NaCl, is a(n) ___ crystal. ionic
Ionic crystals are ___, unlike solid metals. brittle
___ are covalent compounds made up of many small, repeating units linked together in a chain. Polymers
A ___ is a small molecule that forms a link in a polymer chain. monomer
___ is a synthetic polymer used for grocery bags and food wrap. Polyethylene
Organic polymers are polymers that contain the element ___ and are involved with life. carbon
The monomer of a protein is an ___ ___, which includes carbon, nitrogen, and oxygenatoms. amino acid
___ are organic polymers whose monomer is a sugar molecule called amonosaccharide. Carbohydrates
Created by: jnosik