Chapter 3 Section 3.1 Compounds
What is a chemical bond?
A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms.
What is a compound?
A compound is a pure substance that is made up of two or more types of atoms that are joined together due to a chemical change.
What is an element?
An element is a pure substance is that is made up of one type of atom.
A neutral particle that is made up of atoms that are joined together by covalent bonds is called ________
Covalent compound
What are covalent compounds?
Covalent compounds form when nonmetal atoms bond together by sharing their electrons.
Water is a _________
covalent compound
In covalent compounds, atoms gain or lose electrons to form molecules. True or False
"False - (covalent compounds SHARE their electrons to form molecules.) In ionic compounds, atoms gain or lose electrons to form molecules.
How are atoms held together in compounds?
Atoms are held together in compounds by chemical bonds.
What are atoms in a molecule and ions in an ionic lattice are held together by called?
Chemical bonds
How are chemical bonds formed?
Chemical bonds are formed when atoms gain or lose electrons, or when they share electrons.
A polyatomic ion is electrically neutral. True or False
False - A polyatomic ion is electrically charged. (positive or negative)
An element is a pure substance made of more than one kind of compound. True or False
False - An element is a pure substance made up of only ONE type of atom.
Ions are formed when atoms lose or gain protons. True or False
False - Ions are formed when atoms lose or gain electrons.
How are ionic compounds formed?
If atoms gain electrons from other atoms or lose electrons to other atoms, they form ionic compounds.
Metals and non-metals may form what kind of compound?
Ionic compound
Sodium chloride is a ________
Ionic compound
What is ionic lattice?
Ionic lattice is a repeating pattern of positive and negative ions.
What are two basic types kinds of compounds?
Molecular and ionic
What is Polyatomic ion (complex ion)?
Polyatomic ion (complex ion) is an ion that is made up of two or more atoms that are held together with covalent bonds.
Why do ionic compounds usually form between metals and non-metals?
The atoms in metals tend to lose electrons. So metals have a positive charge when they form ions. The atoms in non-metals tend to gain electrons. So non-metals have a netative charge when they form ions.
An ionic lattice is a repeating pattern of positive and negative ions. True or False
True.
Atoms are held together by covalent bonds in polyatomic ions. True or False
True.
Compounds form with chemical bonds between different kinds of atoms. True or False
True.
Covalent compounds involve the sharing of electrons, while ionic compounds involve the transfer of electrons. True or False
True.
Water is a molecule formed by the sharing of electrons between atoms of hydrogen and oxygen. True or False
True.
ionic compound
atoms combine by gaining or losing electrons
covalent compounds
atoms combine by sharing electrons to form molecules and neutral particle that is made up of atoms that are joined together by covalent bonds
Atoms and non-metals tend to gain ________
electrons
Do the atoms in non-metals tend to gain or lose electrons?
gain
polyatomic ion
ion made up of two or more atoms that are held together with covalent bonds (a type of molecular ion)
When an atom gains electrons it becomes _________ charged.
negatively
When an atom loses electrons it becomes _________ charged.
positively
element
pure substance made of one type of atom
Ionic lattice
repeating pattern of positive and negative ions