Wood and plastic are considered:

The flow of electrons along a conductor is

The word atom is derived from the Greek word atomos, meaning

The ability of a material to attract iron, cobalt, or nickel is called

When the bond between two atoms occurs to the atoms as a whole it is called a

Electromagnetic radiation deals with both ____________ and _____________.

The periodic table of elements classifies by period and group. The group is the

_____ influenced every aspect of American policing in the nineteenth century (1830-1900).

The lifetimes of a certain brand of photographic light are normally distributed with a mean of 210 hours and a standard deviation of 50 hours. a) What is the probability that a particular light will last more than 250 hours? (2 marks) b) What percent of lights will need to be replaced within 235 hours? (2 marks) c) Out of 2000 lights, how many will have a lifetime between 200 and 350 hours. (2 marks)

The percentage of data that lies within 1 standard deviation of the mean in a normal distribution is