chem science bowl

Which pair of German scientists discovered the atomic fission of uranium?

Hahn and Strassman

Who developed a table of elements revealing regularities in elemental properties in 1869?

Dmitri Mendeleev

Who was the first American chemist to receive a Nobel Prize for precise determination of atomic weights (1914)?

Theodore Richards

What is the maximum number of electrons that can occupy an s orbital?

Two

Which term refers to the number of molecules or ions attached to a central metallic atom?

Coordination number

What is the common name for calcium oxide, CaO?

Quicklime (Lime)

What term refers to a material which slows neutrons?

Moderator

What refers to the scattering of light by colloidal particles?

Tyndall effect

Who is accredited with proving that neutrons existed?

James Chadwick

What refers to an easily melted product of the reaction between flux and ore impurities?

Slag

Name the thermodynamic state function that is a measure of randomness.

Entropy

What term is used to describe silver which contains 7.5% copper?

Sterling

Name the state function that represents the heat content of a system.

Enthalpy

Which noble gas has the highest melting point?

Radon

Why do noble gases have low boiling points?

Only weak Van der Waals forces hold the atoms together

For which class of salts are all of its compounds soluble in water?

Nitrates

What is aqua regia?

A mixture of three parts concentrated hydrochloric acid and one part concentrated nitric acid

A solution with a pH of 12 is what?

Strongly basic

Which halogen has the largest atomic radius?

Astatine

What class of organic compounds is characterized by an -OH group bonded to an alkyl group?

Alcohol

Which compounds contain sp2 hybridized carbon atoms?

Alkenes

After carbon, hydrogen, and oxygen, the next most abundant element in proteins is what?

Nitrogen

Which element is represented by the symbol B?

Boron

What is the element represented by the symbol Rb?

Rubidium

What is the element represented by the symbol Sn?

Tin

What is the element represented by the symbol Sr?

Strontium

In the periodic table, what identifies a horizontal row?

Period

What describes the orientation of bonds in an sp3 hybridized atom?

Tetrahedral

Forces in ionic crystalline solids are primarily what?

Electrostatic

Normality is defined as the number of what?

Equivalent weights of solute per liter of solution

What is the oxidation number of N in NaNO2?

+3

Which halogen does not replace the other halogens from their compounds (excluding astatine)?

Iodine

The bond in hydrogen chloride is which type?

Polar covalent

Which concentration expression is defined as the number of moles of solute per kilogram of solvent?

Molality

The substance considered to be the earliest stage in coal formation is what?

Lignite

The hydrolysis of a fat using a solution of a strong hydroxide is called what?

Saponification

Who hypothesized that it is impossible to know exact location and momentum simultaneously?

Heisenberg

Ammonia can be considered a Lewis base because it can donate what?

Electrons

Acids react with bases to form what?

Salt and water

What is a metallic salt of a fatty acid?

Soap

Proteins are considered to be polymers of what?

Amino acids

Name any five of the six noble gases.

Helium, neon, argon, krypton, xenon, radon

Name any four alkali metals.

Lithium, sodium, potassium, rubidium

What functional group do all ketone molecules contain?

Carbonyl group

Who first stated the law of conservation of mass?

Lavoisier

Who explained the photoelectric effect?

Einstein

Who hypothesized that particles could have wave-like properties?

De Broglie

Who developed the equation used to determine the probability of finding an electron in any given place?

Schrodinger