What is a noble gas? Group 18 He, Ne, Ar, Kr, Xe, Rn
100
I was discovered by JJ Thomson.
What is the electron? For a $200 bonus, describe his experiment.
100
How do I determine the number of neutrons in an atom?
Subtract the atomic number from the atomic mass number.
100
What are the three atomic particles? What are their electrical charges?
neutron = 0
electron = -1
proton = +1
200
I have 12 protons
What is Magnesium
200
I am extremely reactive with water. The further down the group, the more explosive I become.
What are the alkali metals (group 1) Li, Na, K, Rb, Cs, Fr.
200
How many electrons are needed to fill the third energy level?
What are 18 electrons -- 2s 6p and 10d?
200
Atoms can have different numbers of neutrons. Will this change the element's name?
No, elements are determined by the number of protons. Changing the number of neutrons creates isotopes.
200
Name the first 8 elements.
H, He, Li, Be, B, C, N, O, F, Ne
300
I have 17 protons and 18 electrons. Who and what am I?
What is Cl with a -1 charge
300
I am having my d orbitals filled with electrons. Who am I and how many electrons will I need to fill my d orbitals?
What are the transition metals? Groups 3-12.
300
How does Bohr's atomic model differ from the modern atomic model.
In Bohr's atom, electrons occupy orbitals at discrete energy levels (quanta). Bohr's model has electrons moving around the nucleus in orbits...or circles. Modern atomic theory describes the orbitals are areas where there is a high probability of detecting an electron - a "cloud".
300
How big is the nucleus in comparison to the whole atom? Who did the experiment to determine this?
"like a speck of dust in a movie theater"
Rutherford and his gold-foil experiments
300
Which elements are NOT metals?
The non-metals (C, N, O, P, S, Se), the Noble gases and the halogens.
400
I have 12 protons and 12 electrons and 14 neutrons. Who and what am I?
What is C-14; I am an isotope.
400
I am reactive because I desperately need one more electron to fill my p-orbitals.
What is a halogen (Group 17). F, Cl, Br, I, At
400
If an electron is energized, it will move to an excited state. What happens when that electron loses energy?
It returns to a ground state and in the process emits light. If the energy drop is large, the light that is emitted will have a higher energy -- violet light has high energy with short wavelength. Red has lower energy with a longer wavelength.
400
Which groups make up the S block of elements?
Groups 1 and 2 - the alkali metals, and the alkaline earth metals.
500
1s2 2s2 2p6 3s2 3p6 4s2 3d6 and I have 28 protons.
What is nickel with a +2 charge?
500
I am radioactive and very unstable. Most of me does not occur in nature.
What are the actinides?
500
How much mass does an electron have compared to a proton?
about 1/1000.
500
Why does the atomic radius decrease as you move across a period from group 1 to group 18?
The number of protons increases thereby increasing the positive charge. We are also adding electrons to the same electron shell. Therefore the increased positive charge will draw the electrons closer to the nucleus.
500
What is "ionization energy"? How does it change as you move across the periods and up or down the groups?
The energy required to remove an electron from an atom.
It decreases as you move down a group and it increases as you move across the period.
$500 bonus, explain why.