FREE QUIZ BOWL AND STUDY GAMES ABOUT YGK

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FREE QUIZ BOWL AND STUDY GAMES ABOUT YGK

ELEMENTS EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -57 Questions and Answers -format set of multiple-choice -Expert- Explanation Question 1: Fullerenes such as buckyballs and carbon nanotubes, on the other hand, are generally produced synthetically; buckyballs are roughly spherical.

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Carbon Question 2: most common metal in the Earth, and one of the major components of the core as well. Iron was known to the ancients; its atomic symbol Fe comes from the Latin name ferrum.

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Iron Question 3: Because of their different quantum properties (the He-3 nucleus is a fermion, while the He-4 nucleus is a boson), the isotopes of it ly have significantly different physical properties.

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Helium

Question 4: It has the lowest boiling point of any element; it's liquid form is used for devices that need intense cooling, such as MRI machines.

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Helium Question 5: Diatomic O is paramagnetic, meaning it has unpaired electrons. This points out a problem with traditional valence bond theories, which predict that O should be diamagnetic; molecular orbital theory correctly explains this behavior.

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Oxygen Question 6: As an element, it is used in the vulcanization process to cross-link the polymer strands of rubber to increase rubber's strength; similarly, its double bonds hold many proteins together.

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Sulfur Question 7: Conversely, its stability makes it useful in preventing unwanted combustion reactions. It also has a relatively low boiling point (-196°C), which makes liquid nitrogen useful as a refrigerant.

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Nitrogen Question 8: Older names for it, reflecting its liquid nature, include hydrargyrum (the source of its symbol) and quicksilver.

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Mercury

Question 9: Atomic Symbol Al, Atomic Number 13

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Aluminum Question 10: It is found in the mineral corundum, which is found in many gems, including sapphires and rubies; the specific impurities found in a gem determine its color. It is also found in aluminosilicates such as feldspar.

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Aluminum

Question 11: known to the ancients as a relatively inert metal. Its atomic symbol Au comes from its Latin name, aurum.

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Gold Question 12: It can react with oxygen in the air to form iron(III) oxide, Fe2O3, in a relatively slow but exothermic process; this process is used in "all-day" heat patches.

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Iron Question 13: Scanning electron microscopy (SEM) often requires that specimens be "sputtered," or thinly coated, with its' atoms to allow imaging.

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Gold Question 14: Compounds of this element are noted for their strong and unpleasant odors; small quantities of hydrogen sulfide, H2S, are frequently added to natural gas, which is normally odorless, to help detect gas leaks

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Sulfur Question 15: In addition to the main isotope (also called protium), there are two other significant isotopes of hydrogen: deuterium (2H or D), which has one neutron, and tritium (3H or T), which has two neutrons.

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Hydrogen Question 16: Industrially, though, the majority of it is used to make sulfuric acid, H2SO4 (in fact, sulfuric acid is the most widely produced chemical in the chemical industry).

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Sulfur

Question 17: atomic symbol O, atomic number 8

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Oxygen

Question 18: Iron (II) sulfide, FeS2, is formally known as pyrite, but because of its appearance has long been known as fool's gold.

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Iron Question 19: He-4 can exist in a zero-viscosity state known as superfluidity when its temperature drops below the lambda point.

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Helium Question 20: Its most stable allotrope is an eight-membered ring that exists as a yellow solid. It is most often isolated by injecting superheated steam into the ground in the Frasch process.

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Sulfur

Question 21: Atomic Symbol Au, Atomic Number 79

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Gold Question 22: Its primary ore is bauxite, from which it is refined using large amounts of electric current, via electrolysis, through the Bayer & Hall-Héroult processes.

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Aluminum Question 23: Most abundant element in Earth's atmosphere. First isolated as "noxious air" by Daniel Rutherford, exists primarily as a diatomic molecule containing two triple-bonded atoms (N2).

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Nitrogen

Question 24: Atomic Symbol C, Atomic Number 6

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Carbon