Atoms
What charge does an electron have?
It is negatively charged.
Balance the following equation: __Mg+__O2-->__MgO
2Mg+1O2-->2MgO
What 2 things account for atomic mass?
Protons and Neutrons
What is a reactant?
Substances that are about to react.
What is a product?
New substances that are produced in a reaction.
What is located in the nucleaus?
Protons and Neutrons
Balance the following equation:
__Al2O3-->__Al+__O2
2Al2O3-->4Al+3O2
Why is Dmitri Mendeleev important to the Periodic Table?
He created the first Periodic Table based on Atomic Mass.
What is the Law of Conservation of Mass?
Mass is neither created nor destroyed in chemical reactions.
What is a Synthesis Reaction?
A reaction where two or more substances combine to form another substance.
What is the max number of electrons in the 3rd energy level?
18 Electrons
Balance the following equation:
__Na+__H2O-->__NaOH+__H2
2Na+2H2O-->2NaOH+1H2
How is the Periodic Table organized?
By groups and periods.
What is the difference between an Ionic and Covalent Bond?
Ionic Bonds lose or gain electrons and Covalent Bonds share electrons.
What is a Single-Displacement Reaction?
A reaction in which one element replaces another in a compound.
Elements found in groups 3-12 are called what?
Transition Metals
Balance the following equation:
__P4+__O2-->__P4O6
1P4+3O2-->1P4O6
Noble Gasses have how many valance electrons?
Eight
Explain how many electrons are needed in group 17 in order to be stable.
Elements in group 17 have 7 valence electrons, they need 1 more in order to be stable.
If a Carbon atom has 7 neutrons and 6 protons, what is its atomic mass?
Atomic Mass of 13.
Elements that are gases, brittle, and poor conductors are what kind of element?
Nonmetals.
Balance the following equation:
__NaOH+__FeCl3-->__NaCl+__Fe(OH)3
3NaOH+1FeCl3-->3NaCl+1Fe(OH)3
Where are metalloids found on the Periodic Table?
Along the stairstep.
In order to show that a substance is a solid in a chemical equation, what symbol would you use in order to represent this?
(s)
What is the only metal found in liquid form at room temperature?
Mercury