Atoms and Ions
I have an atomic number of 42... how many protons and electrons do I have?
What did Rutherford discover?
What is a nucleus?
What is the weakest kind of particle - and what can it penetrate?
What is an alpha particle - and what is human skin or paper?
Write the three phases of matter in order of increasing energy.
solid -> liquid -> gas
Write the symbolic and hyphen notation for Krypton (OK I might be a LITTLE biased)...
symbolic - atomic # and mass # switched
hyphen notation : element followed by dash and mass number
What experiment is J.J. Thompson known for?
What is a Cathode Ray Tube?
Chem reaction -rearrangment of atoms
Nuclear - reaction occurs within the NUCleus
List all the phase changes that are exothermic.
What is condensation, freezing, and deposition?
Which of the following explain how an ion is formed? Explain your answer...
a. adding or subtracting protons to/from an atom
b. adding or subtracting neutrons to/from an atom
c. adding or subtracting electrons to/from an atom
What is answer choice c?
Z-152, Z-155, and Z-159. Which Isotope is most abundant and why?
What is Z-155? Because it is the number closest to 156.
List at least two of the findings of Dalton...and state whether they were true or false...
Any of these four:
-All matter is composed of small particles called atoms, the smallest unit of matter (false)
-All atoms of a given element are identical (false)
-Atoms of different elements have different properties (true)
-In a chemical reaction, atoms are rearranged but maintain the same mass (true)
What atom is produced when Thorium-234 undergoes alpha decay? Write the equation.
What separation technique separates substances based on their density.
What is decantation?
Hafnium (Hf) has a charge of 5+. How many electrons does it have?
How much is 67? (6 7 ... haha)
Calculate the average atomic mass of the following data:
Carbon-12: 98.89% and Carbon-13: 1.11%
What is 12.01 amu?
What was the name of the oldest philosopher for atomic theory?
Who is Democritus?
A 64.0 gram sample of radioactive isotope decays to 1.00 grams in 360.0 seconds. What is the half-life of the isotope?
What is 60 seconds?
several examples:
heterogeneous: salad, cookie, opened soda bottle
homogenous: vanilla milkshake, ketchup, vinegar
Chemistry Theatre: Bring your group up to model the atom: have three people be a proton, neutron and electron... and where they are in the atom.
protons and neutrons in the middle, electrons circling outside
Give the symbolic notation (charges included if applicable) for the following element:
protons: 80
neutrons:130
electrons: 76
Upper Left: 210
Lower Left:80
Hg4+
Challenge (not covered)... what is the name of the scientist(s) that proposed the modern model of the atom?
HINT: A cat may be involved!
Who is Heisenberg (or) Schrodinger?
The half life of element A is 250.0 years.
You currently have 48.5 grams of the original sample. How many grams would have been in the sample 1500 years ago?
How much is 3,104 grams?
Draw a phase diagram of water and label:
-states of matter
- the triple point, critical point, and where normal pressure is
correct drawing ( Y shaped and normal pressure = 1.01 bar, 1.00 atm or 101 kPa)