Scientists and Experiments
Niels Bohr proposed an atomic model that explained how electrons didn't spiral into the nucleus, but orbit in different levels in the negatively charged electron cloud. What is the name of this model?
Bohr Model
How many lithium atoms in the world have a mass of 6.94 amu?
None! This is the AVERAGE mass of all atoms in the world.
How many orbitals does d subshell have AND electrons can fit in d subshell?
5 orbitals and 10 electrons
Which rule is being disobeyed for this ground state electron configuration:
1s22s22p64s2
Aufbau
What is Mr. Baughman's favorite hockey team?
Pittsburgh Penguins
What are the four elements originally thought up by the Greeks?
Fire, Earth, Wind, Water
Which of these contains 15 protons?
sulfur-32, nitrogen-15, 32P, 15O
32P
What element has an ending electron configuration of 4d3
Nb
Which electron configuration is incorrect?
a) 1s22s22p63s23p64s23d104p65s24d105p6
b) [Kr]5s24d105p6
c) 1s22s22p63s23d103p64s2
c) 3d10 is in incorrect spot
Which of two of these are isotopes of each other?
sodium-23, magnesium-23, sodium-22
sodium-23 and sodium-22
Isotopes must have the same number of protons but different number of neutrons
Ernest Rutherford conducted an experiment where he discovered that the atom consisted of a dense, positively charged nucleus and negatively charged orbiting electrons. What was the name of this experiment?
Gold Foil Experiment
Chlorine-37 has how many neutrons?
20
Whose rule states that electrons in the same orbital must be spinning in opposite directions?
Pauli Exclusion Principle
Write the abbreviated electron configuration for argon.
[Ne]3s23p6
To determine the mass number of an atom, you take _____ + _____
atomic number(protons) + neutrons
Who came up with the term "atomos", or atoms, by considering if you cut something in half over and over again that you would end up with something small and unbreakable?
Democritus
In 66Zn, what does the 66 mean?
mass number
P orbitals are ______ shaped and have ___ orbitals
dumbbell ; 3
What element has two paired electrons and 1 unpaired electron in the 4p orbitals?
Bromine
Use your periodic table. The most abundant isotope of strontium has ____ neutrons.
50
J.J. Thomson proposed an atomic model that had a total positive charge which cancelled out the charge of the electrons. What was the name of this model AND experiment?
Plum Pudding Model / Cathode ray tube
(Looks like a chocolate chip cookie)
An element has a mass of 45, charge of -2, and 23 electrons. How many neutrons does this element have?
24
(-2 charge means 2 more electrons than protons so there must be 21 protons. Using mass number, there are 24 neutrons)
What is the noble gas/abbreviated electron configuration for lead?
[Xe]6s24f145d106p2
Which rule states that electrons in p orbitals must have one electron in each orbital prior to pairing up?
Hund's rule
A sample of element X contains 90% X-35 atoms, 8% X-37 atoms, and 2% X-38 atoms. Calculate the average mass.
35.22 amu