Answer to Question #56711 in Organic Chemistry for higo

Question

what must occur for a change to be a chemical reaction?
A chemical change occurs when a piece of word
-a light is produced when an electron moves from one energy level and?
a. jump to higher energy level
b. falls to a lower energy level
c. moves into the nuclear
d. moves to another position in the same sublevel
-the least penetrating from of radiation is?
a. beta radiation
b.gamma radiation
c. alpha radiation
d. x-rays
-all of the following are physical of matter except ?
a. mass
b.ability to rust
c.melting point
d. color
-which of the following is a physical change?
freezing
ability to rust
rusting
burning
-which of the following is a chemical property?
color
ability to burn
freezing point
hardness
-for an electron in an atom to change from the ground state to an exited state
energy must be released
energy must be absorbed
radiation must be emitted
the electron must make a transition from higher to a lower energy level