Lesson 1
An atom that has gained or lost electrons is called a(n) ____________________.
An atom that has gained or lost electrons is called a(n) ______ion______________.
What is this?
The force of attraction between a positive ion and a negative ion in an ionic compound.
Ionic bond
What is an oxidation number?
An oxidation number is a positive or negative number that indicates how many electrons an atom has gained, lost, or shared to become stable.
How many atoms are the prefixes mono, tetra, and hexa?
1, 4, and 6.
What is a chemical formula?
A chemical formula shows what elements a compound contains and the exact number of atoms of each element in one unit of that compound.
What is this?
The force of attraction between two atoms that share electrons.
Covalent bond
True or False
An element that loses electrons when bonding with other atoms has a negative oxidation number.
False
Definition: A positively or negatively charged, covalently bonded groups of atoms.
Polyatomic Ion
What is a chemical bond?
Chemical bonds are the forces that hold atoms together in molecules and compounds.
True or False
A covalent bond is the force of attraction between the opposite charges of the ions in an ionic compound.
False
What is the oxidation number of the elements in group 16?
It is (-2).
What is a polar bond?
A covalent bond in which electrons are shared unequally.
What is an ionic bond?
The force of attraction between the opposite charges of the ions in an ionic compound.
Determine the type of bonding in CaO and in SO(small 2).
CaO is ionic bonding and SO(small 2) is covalent bonding.
Which group on the periodic table is stable?
Group 18
Which definition is a polar molecule and which is a non-polar molecule?
A molecule that shares electrons equally and does not have oppositely charged ends.
A molecule that has a slightly positive end and a slightly negative end.
Polar molecule: A molecule that has a slightly positive end and a slightly negative end.
Non- Polar molecule: A molecule that shares electrons equally and does not have oppositely charged ends.
What is an ion?
A charged particle that has either more or fewer electrons than it has protons.
When atoms of different elements _______________ , _______________ , or _______________ electrons, an attraction forms between the _______________ , forming a _______________ . The attraction is called a _______________ _______________ .
When atoms of different elements _____gain_______ , ______lose_________ , or ___share________ electrons, an attraction forms between the ______atoms_________ , forming a _____compound/bond______ . This attraction is called a ___Chemical________ ____Bond________ .
What are binary compounds?
Binary compounds are compounds which are composed of two elements.
What is a hydrate?
It is a compound that has water chemically attached to its atoms and written into its chemical formula.