Atoms
Three particles within an atom
proton, electron, neutron
Order of the table is based on
atomic number
There are currently this many unique elements on the periodic table
118
How many valence electrons does aluminum (Al) have in its outer shell?
3
The atomic number states how many _______ are within an atom
Protons
There are highly reactive, shiny, and malleable
metals
How many electrons is max for an outer shell?
Eight
Draw the Lewis Dot Diagram for Sulfur (S)
-6 valence electrons
-two sides with single electron
an atom that has the same number of protons but different number of neutrons
isotope
non-metals
Carbon-14 is radioactive and used to date archeological finds. What is the oldest an artifact/organism can be before carbon-14 is unable to be used?
40,000 years
How many neutrons does an iron atom have if the mass number is 54?
Neutrons = 28
atomic number/protons =26
most commonly used model where electrons are in orbitals that act as a best guess for electron locations
modern model
Atoms of elements in the same group of the periodic table share the same
a. valence electrons
b. energy levels
c. atomic numbers
Valence electrons
Neodymium is a rare earth metal that has many uses. One unexpected use involves marine life. What could be made from neodymium to deter sharks?
Fish hooks
What is the charge of an atom of bromine if the number of electrons is 36?
protons=35
protons-electrons = charge
isotope that emits radiation and can be used to date artifacts
radioactive isotope
Which trend is the ability of an atom to want and attract an electron
Electronegativity
This element within living organisms makes up about 1% and is used in ATP
Phosphorus
What element is from the following information?
Mass number = 64
Neutrons = 34
zinc
protons = 30