Periodic Table
What does the atomic number tell you?
the number of protons in an atom
2H2+O2 → 2H2O
In this chemical equation, what is "2H2+O2" called and what is "2H2O" called?
2H2 + O2 = reactants
2H2O = products
This type of bond forms when electrons are shared between atoms.
This type of bond forms when electrons are transferred from one atom to another
Shared - ionic
transferred - covalent
The horizontal rows on the periodic table are called these.
The vertical columns on the periodic table are called these.
rows = periods
columns = groups/families
Elements in the same column (family) of the periodic table have the same number of these.
valence electrons
in 4H2O, what are the 4 and the 2 called?
4 = coefficient
2 = subscript
Carbon has 4 valence electrons. How many additional electrons does it need to complete its outer shell?
4
How many valence electrons does oxygen have?
6
This family of elements is found in Group 18 and is known for being unreactive.
Noble Gases
This law states that matter cannot be created or destroyed in a chemical reaction.
Law of Conservation of Mass
Water (H₂O) contains this type of bond between hydrogen and oxygen
covalent bonds
This element is located in Period 3, Group 17, and has 17 protons.
chlorine
An element with 11 protons belongs to this element.
Sodium (Na)
Balance this equation:
___ Fe + ___ O₂ → ___ Fe₂O₃
4 Fe + 3 O₂ → 2 Fe₂O₃
Predict the bond type formed between magnesium and chlorine and explain why.
an ionic bond because magnesium transfers electrons to chlorine
Balance this equation:
___ H₂ + ___ N₂ → ___ NH₃
3 H₂ + 1 N₂ → 2 NH₃