August 2015 Chemistry Regents

Rubidium and cesium have similar properties because they both have

At STP, oxygen exists in two forms, O₂ (g) and O₃ (g). these two forms of oxygen have

Which formula represents a hydrocarbon?

As the elements in group 15 are considered in order of increasing #, the ionization energy

Why does increasing temperature increase the rate of reaction?

An open flask is half filled with H₂O at 25°C. Phase equilibrium can be reached after

Under which conditions of temperature and pressure does a real gas behave like an ideal gas

Compared to the half life and decay mode of the nuclide ⁹⁰Sr, the nuclide ²²⁶Ra has

Which net change occurs in a nuclear reaction?

Which conclusion was drawn from the results of the gold foil experiment?

Which sample of matter is a mixture?

The atoms in an element are in excited states. A bright line spectrum is produces when atoms...

F₂ + energy -> F + F (Which statement describes what occurs during this reaction?

Compared to distilled water, an aqueous salt solution has

Which statement describes a concept included in the wave-mechanical model of the atom?

Which group on the Periodic Table has at least one element in each of three phases at STP

According to kinetic molecular theory, collisions between particles in a sample of an ideal gas

In a redox reaction, the number of electrons lost is equal to the number of

At which electrode does oxidation occur in a voltaic cell and in an electrolytic cell?

Which formula represents an unsaturated organic compound

In the ground state, an atom of which element has two valence electrons

Which subatomic particles are paired with their charges?

All elements on the periodic table are arranged in order of increasing

Based on Table S, an atom of which element has the weakest attraction for electrons in a bond?

Which group on the Periodic table has elements with atoms that tend not to bond with others?

Which electron configuration represents an atom of magnesium in an excited state?

The ratio of Cr to Fe to C varies among the different types of stainless steel. Therefore its a

Which atoms will bond when valence electrons are transferred from one atom to the other?

The temperature of a sample of matter is a measure of the

A mixture consists of sand and salt water. Which procedure can be used to separate all parts

What is the number of pairs of electrons shared in a molecule of N₂?

Which statement explains why a C-O bond is more polar than a F-O bond?

Which ion in the ground state has the same electron configuration as an atom of argon

According to one acid-base theory, water can act as a base because water can

Which substance can not be broken down by a chemical change?

All isomers of octane have the same

At STP, which substance is a noble gas?

Which statement describes a chemical property of sodium?

According to Arrhenius theory, when potassium hydroxide dissolves in H₂O the only negative ion 

Which term identifies a type of chemical reaction?