A student listed the characteristics of chemical and nuclear reactions. Chemical and Nuclear Reactions
C- A change in atomic number of elements takes place
D- The atomic number of elements remains the same

Which of these statements best explains the identity of Reaction D?
A. It is a nuclear reaction because the atomic number remains the same when the number of valence electrons changes.
B. It is a nuclear reaction because the atomic number remains the same when the particles are emitted from the nucleus.
C. It is a chemical reaction because the atomic number remains the same when the number of neutrons and protons changes.
D. It is a chemical reaction because the atomic number remains the same for all elements while a rearrangement of atoms through bonding occurs.

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced