Chemistry exam review
Yellow light has a frequency of 5.2 × 10^14 Hz and travels at a speed of 3.0 × 10^8 m/s. What is the wavelength of yellow light, in meters? 5.8 × 10^-7 m 2.2 × 10^-6 m 1.7 × 10^6 m 8.2 × 10^22 m
5.8 x 10^-7 m
Which type of reaction does this diagram represent? a chain reaction that is caused by nuclear fission a chain reaction that is caused by nuclear fusion a decrease in energy that is caused by nuclear fission an increase in energy that is caused by nuclear fusion
A chain reaction caused by nuclear fission
Who reported four "element" classifications, but included some substances that were combinations of elements rather than true elements in his listing? Henry Moseley Dmitri Mendeleev Antoine Lavoisier Johann Dobereiner
Antoine Lavoisier
Which lists the waves in order of wavelength, from longest to shortest? X-rays, infrared, radio waves infrared, visible light, gamma rays ultraviolet, microwaves, visible light radio waves, gamma rays, visible light
Infrared, visible light, gamma rays
Which property would xenon most likely have? It is stable. It is a solid. It is flammable. It is silver in color.
It is stable
Which statement do these reactions best support? Beta decay occurs only in certain atoms. Alpha decay occurs only in certain atoms. Chain reactions play important roles in the process of nuclear fission . Nuclear fusion plays an important role in making elements that are heavier than helium.
Nuclear fusion plays an important role in making the elements that are heavier than helium
In which isotope is the strong nuclear force not strong enough to balance electrostatic forces between protons? carbon-13 hydrogen-2 neon-21 uranium-238
Uranium- 238
The alpha decay of a radioactive nuclide (X) emits a He-4 nucleus and produces an isotope of ^235/92 U. What is X?
^239/94 Pu
A large atom decays and emits a particle. After the reaction is complete, the atom's mass has changed substantially. What kind of particle has most likely been emitted? alpha particle beta particle positron photon
alpha particle
Chuck wants to know how many electrons in an atom are not paired up. Which model would be best for Chuck to write out? a set of quantum numbers for the last electron in the atom a configuration with numbers, letters, and superscripts a dot structure of the atom an orbital notation of the atom
an orbital notation of the atom
The symbol for xenon (Xe) would be a part of the noble gas notation for the element antimony. cesium. radium. uranium.
cesium
A patient is receiving treatments for brain cancer. Which electromagnetic waves are most likely being used as part of the treatment? infrared ultraviolet microwave gamma ray
gamma ray
Which is a set of valid quantum numbers? n = 4, l = 4, m = 4 n = 1, l = -2, m = 0 n = -1, l = 0, m = 0 n = 4, l = 3, m = 3
n = 4, l = 3, m = 3
A plate of the steel hull of a ship develops a large crack when the ship strikes a reef. Analysis of the steel's composition shows higher-than-normal levels of an element that could explain why the plate cracked instead of bending.Which element is most likely suspected? iron sulfur chromium nickel
sulfur
