Y9 Chemistry Flashcards
Know for exam
ion
definition
an atom or molecule that has gained or lost one or more electrons and is electrically charged
polyatomic ion
definition
a group of covalently-bonded atoms that is electrically charged
valence electron
definition
an electron that occupies the outermost energy level of an atom
ionic bond
definition
a type of chemical bond that occurs between oppositely-charged ions
covalent bond
definition
a type of chemical bond that occurs between non-metal atoms
reactant
definition
a substance that undergoes change during a chemical reaction
product
definition
a substance that is produced during a chemical reaction
Determine the charge of ions formed from atoms in Groups 1, 2, 13, 15, 16, and 17.
1: 1+
2: 2+
13: 3+
14: (4-+)
15: 3-
16: 2-
17: 1-
What does ionic bonding involve?
Ionic bonding involves the attraction of oppositely-charged ions, and results in the formation of a crystalline lattice.
What does covalent bonding involve?
Covalent bonding involves the sharing of electrons between non-metal atoms and results in the formation of discrete molecules.
Distinguish between substances that are formed from ionic, covalent, and metallic bonds.
Ionic - metal and non-metal
Covalent - non-metal and non-metal
Metallic - metal and metal
3
What elements form diatomic elemental gases?
They form gases in pairs
H, N, O, and the Group 17 elements form diatomic elemental gases - I Bring Clay For Our New House
Recall the Law of Conservation of Mass.
The Law of Conservation of Mass states that mass is neither created nor destroyed during a chemical reaction.
What should be included when writing balanced chemical equations from observations of chemical reactions?
Include state symbols!
What are the products of a complete combustion reaction?
The products of a complete combustion reaction are carbon dioxide and water.
