How do you find the molar mass of an element
Add the molar mass of each element
What types of elements are along the staircase on the periodic table
Metalloids
What elements are to the right of the staircase
nonmetals
What elements are to the left of the staircase
metals
What group is unreactive on the periodic table
Nonmetals (noble gases)
What does the atomic number of an element tell you
Number of protons number of electrons in location
How do I find the number of neutrons in an element
Atomic number minus atomic mass
Alkali metals are located in what group of the periodic table
Group 1
Atomic size
increases from top to bottom within a group and decreases from left to right across a period.
Electronegativity
Ability of an Atom to attract electrons to itself; increases going up and to the right
Ionization energy
The amount of energy required to remove an electron from an atom; increases going up and to the right as electrons move closer to the nucleus
How can you tell how many valence electrons an element has
group number (column)
Cation
A positively charged ion
Anion
A negatively charged ion
Alpha decay
4/2 He, The nucleus emits an alpha particle
Beta decay
0/-1 e, when an electron is lost
Positron decay
a nuclear reaction in which a positron is emitted
diatomic elements
H2, N2, O2, F2, Cl2, Br2, I2, elements that can never exist alone
Combustion
Something reacting with oxygen
Ionic bond
Formed when one or more electrons are transferred from one atom to another
Why do elements produce differently colored flames when held in a Bunsen burner
Electrons in partially filled the d orbitals jump to different orbitals and fall back down, releasing energy at different wavelengths
What type of reaction consist of a single product
Ex) A + B -> AB
Synthesis
Double replacement
Two compounds react to form to new compounds
Ex) AB+CD -> AD + CB
Neutralization
A reaction between an acid and a base
Ex) HX + YOH -> H2O + XY
Decomposition
A chemical reaction that breaks down compounds into simpler products.
Ex) Ab-> A + B