Bonds
This type of bond is a force of attraction between atoms or groups of atoms.
What is a chemical bond?
Water is able to dissolve many substances because of this.
What is polarity?
A chemical reaction in which a compound breaks down into two or more simpler substances.
What is a decomposition reaction?
On its first trip to the US the Hindenburg left this European country.
What is Germany?
Compounds that are made of two elements.
What are binary compounds?
An atom or a group of atoms that has a positive or negative charge.
What is an ion?
Water cannot dissolve gasoline because gasoline is made up of these kind of molecules.
What are non-polar molecules?
A chemical reaction in which one element takes the place of another element in a compound.
What is a single replacement reaction?
A 19th century English physicist.
Who is James Joule?
Compounds that are formed when atoms share electrons in covalent bonds.
What are molecular compounds?
A chemical bond formed between oppositely charged ions.
What is an ionic bond?
When water is a(an) ____ its molecules are farther apart than when it is a(an) ____.
What is solid and liquid?
A chemical reaction in which two or more substances react to form a single compound.
What is a synthesis reaction?
Chemists use this to count atoms, ions, or molecules.
What is a mole?
The formula for dihydrogen monoxide.
What is H20?
A chemical bond in which two atoms share one or more pairs of valence electrons.
What is a covalent bond?
All biochemists agree that if water were not a ____ at room temperature, life as we know it could not exist.
What is a liquid?
A chemical reaction in which a substance reacts rapidly with oxygen.
What is a combustion reaction?
An Italian chemist who came up with a way to describe large amounts of very small particles.
Who is Amedeo Avogadro?
A formula of an ionic compound describes this.
What is the ratio of the ions in the compound?
A type of covalent bond in which the electrons are not shared equally.
What is a polar covalent bond?
A water bug can walk across the surface of a pond because of the surface tension of water caused by this.
What is cohesion?
A chemical reaction that absorbs energy from its surroundings is a(an)_____ reaction, and a chemical reaction that radiates energy to its surroundings is a(an) ______ reaction.
What are endothermic and exothermic?
Energy is measured using these units.
What are joules?
A covalently bonded group of atoms that has a positive or negative charge and acts as a unit.
What are polyatomic ions?