The periodic table
Who organized the first periodic table
Mendeleev
These subatomic particles have no charge
Neutrons
Which subatomic particle has a negative charge
electrons
How many neutrons does H have?
What does PPE stand for?
personal protective equipment
what is different about elements on the staircase?
metalloids; have properties of both metals and non-metals
What is the purpose of the strong nuclear force
holds the atom together
Which particle gives atoms their identity?
protons
How many protons does Al have?
What charge to alpha particle have?
positive
how is the periodic table currently organized?
by atomic mass / protons
what does AMU stand for
atomic mass units
These subatomic particles affect the weight of the atom
neutrons and protons
How many neutrons would Mg have on average?
12-13
What is an ion?
An atom with a positive or negative charge
what group on the periodic table is the most reactive?
1st column metals
Define an isotope
variations of an element with the same number of protons but differing numbers of neutrons
Using the atomic number, you can find the number of these two particles in an atom
protons, electrons
Who is less reactive: Ne or Xe
Ne
which model of the atom have we typically used in class?
Bohr's or planetary
Name and identify 3 groups on the periodic table
metals, non-metals, metalloids, life elements, noble gases, alkaline metals, transition metals etc
Write a formula to calculate the number of neutrons from information in an element box
atomic weight - atomic # = neutrons
Give 2 reasons why the planetary model of the atom can be considered incomplete
incorrect physical features surrounding electron area and overall scale
What is the symbol of the biggest element on the table?
Fr
Why did rutherford use gold for his experiment?
malleable, dense