Model B: In this model the atom is a solid sphere that cannot be divided up into smaller particles or pieces. The atom is neutral and has no charge. Atoms of the same element are

mad of the same types of atoms.

Model D: In this model the atom is a sphere containing negatively charges particles

embedded in it. These small negative particles were originally called “corpuscles”

and later called electrons. However it was recognized that the atom is neutral (no

charge) so there must be an equal positive charge in the atom to offset the negative

charge of the electrons. Since no other particles were known at this time the rest of

the atom consisted of a positive charge.

It is possible to remove a negatively charged particle from an atom using electrical forces

(Thompson, 1897). Compare models B and D. Which model supports this evidence?

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

One does not belong why? ice, gold ,wood ,diamond and table salt

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays