Advanced Atomic Theory
This postulate of Dalton’s atomic theory was later proven false by the discovery of isotopes.
What is "All atoms of an element are identical"?
The most electronegative element on the periodic table.
What is fluorine?
These metals react violently with water and must be stored in oil.
What are alkali metals?
The speed of light in a vacuum equals this numerical value.
What is 3.00 × 10⁸ m/s?
The molar mass of CO₂ is approximately this value.
What is 44 g/mol?
The number of valence electrons in carbon.
What is 4?
Bohr’s model could only explain the emission spectra for this element.
What is hydrogen?
This noble gas has the smallest atomic radius.
What is helium?
These metals are found in fireworks for their bright colors.
What are alkaline earth metals?
The equation E=hν was proposed by this scientist.
Who is Max Planck?
This type of radioactive decay emits a helium nucleus.
What is alpha decay?
The electron configuration of sodium ends in this orbital.
What is 3s¹?
The concept that electrons occupy the lowest available energy levels is known as this principle.
What is the Aufbau Principle?
This transition metal has the highest melting point.
What is tungsten (W)?
These nonmetals exist as diatomic molecules and are highly reactive.
What are halogens?
A photon of blue light has higher energy than red light because of this property.
What is higher frequency?
Beta decay increases the atomic number by this amount.
What is one?
The noble gas shorthand for chlorine is this.
What is [Ne]3s²3p⁵?
Thomson used this instrument to discover the electron.
What is the cathode ray tube?
Ionization energy generally increases across a period because of these two reasons
What is increasing nuclear charge and smaller radius?
These elements are stable due to their complete valence shells.
What are noble gases?
When an electron moves from n = 5 to n = 2 in hydrogen, this type of light is emitted.
What is visible light (Balmer series)?
Fission releases energy because of this fundamental principle of mass-energy equivalence.
What is Einstein’s E=mc2?
Elements in the same group have similar chemical properties because they share this feature.
What are the same number of valence electrons?
The mathematical probability region where an electron is most likely found is called this.
What is an orbital?
The shielding effect explains why this property increases down a group.
What is atomic radius?
These metals form colorful ions due to partially filled d-orbitals.
What are transition metals?
Calculate the wavelength of a photon with frequency 5.0 × 10¹⁴ Hz. (Show in meters)
What is 6.0 × 10⁻⁷ m?
In nuclear fusion, light nuclei combine to form heavier ones, releasing this particle in the process.
What is a neutron?
The 3d orbitals begin filling after this orbital.
What is 4s?