The name iron (ii) chloride would indicate that the compound contains
a. iron ions with an 11+ charge
b. iron ions with a negative charge
c. two ions of chlorine
d. none of the above
d is the wrong answer

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.