Electron Configuration
EM Spectrum
Periodic Table
History
Nuclear
100
1s2 2s2 2p6 3s1
What is sodium?
100
Which part of the electromagnetic spectrum has the lowest energy?
What is radio waves?
100
The horizontal rows on the periodic table are called this.
What are periods?
100
Mendeleev organized his periodic table according to this property because atomic number had not been discovered.
What is mass?
100
This type of nuclear radiation is the most energetic.
What is gamma?
200
If an atom has a -3 charge, the number of its electrons compares to its number of protons in this way.
What is it has 3 more electrons than its atomic number (number of protons).
200
This symbol represents the constant for the speed of light.
What is c?
200
The groups on the periodic table are sometimes called this because they share characteristics.
What are families?
200
This ancient philosopher posited that everything in the universe was made of four elements: earth, air, fire, and water.
Who was Aristotle?
200
These two particles have essentially no mass and the same symbol. They differ only by charge.
What are electrons and positrons?
300
The s-orbital is spherical and can hold 2 electrons. P is dumbbell-shaped and can hold 6 electrons. D-orbitals can hold this many electrons.
What is 10?
300
This symbol is used to represent wavelength.
What is lambda?
300
All of the neutral atoms of elements in this group have seven valence electrons and lack just one, making them highly reactive.
What is Group 17, 7A or Halogens?
300
JJ Thomson discovered these negatively charged subatomic particles and called them "corpuscles". We now know them as this.
What are electrons?
300
The symbol for this particle looks like a fish and when an atom emits it, that atom loses 4 amu from its mass and two protons.
What is an alpha particle?
400
Elements in Group 1 (alkali metals) on the periodic table are violently reactive with water. One of the main reasons is that they have this many valence electrons.
What is 1?
400
The relationship between frequency and wavelength in the electromagnetic spectrum can best be described with this mathematical term.
What is inverse?
400
This characteristic is defined as the ability of a bonded atom to attract electrons to itself and generally increases to the right and up on the periodic table (excluding noble gases). Fluorine has the most, and Francium has the least.
What is electronegativity?
400
This scientist proposed four postulates about the atom and revived the idea of Atomic Theory.
Who was John Dalton?
400
These two things are sometimes called nucleons, nuclides, or hadrons. They can be found in the nucleus of atoms.
What are protons and neutrons?
500
This word represents the eight valence electrons that atoms need to be content (and largely inert). Examples of atoms that have this many as neutral atoms are noble gases, excluding Helium.
What is octet?
500
This part of the electromagnetic spectrum is used for night vision equipment.
What is infrared?
500
This characteristic of atoms increases to the left and down the periodic table. It has to do with the atom's ability to draw electrons close to the nucleus.
What is atomic radius?
500
This scientist used alpha particles and gold foil in order to demonstrate the existence of the nucleus within the atom and to prove that it was very small in comparison to the rest of the atom.
Who was Rutherford?
500
This isotope is used in radiocarbon dating.
What is Carbon-14?
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