Chemistry of Life

The three particles that make up atoms are:

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and neutrals
• protons, neutrons, and electrons

What are found in the space surrounding the nucleus of an atom?

• protons
• electrons
• neutrons
• ions

Isotopes are atoms of the same element with the same number of protons and a different number of 

• electrons
• molecules
• neutrons
• ions

Which of the following is a substance formed by the chemical joining of two or more elements in definite amounts?

• compound
• isotope
• nucleus
• enzyme

What type of ion forms when an atom loses electrons?

• neutral
• positive
• negative
• radioactive

In a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms.  As a result, the oxygen atom is

• slightly negative
• very negative
• slightly positive
• very positive

When sugar is dissolved in water, water is the 

• reactant
• solution
• solute
• solvent

While preparing a cell culture, a scientist places a colony of bacteria into distilled water and stirs it.  This mixture of water and living cells would be best called 

• a solution
• a suspension 
• a buffer
• an adhesion

A map of eastern North America, showing the pH of rainfall in the various states, indicates that the pH of rain in New York State varies from 4.22 to 4.40.  According to these figures, the most acidic rainfall in New York State has a pH of

• 4.22
• 4.30
• 4.35
• 4.40

What is the process that changes one set of chemicals into another set of chemicals?

• cohesion
• hydrogen bonding
• chemical reaction
• dissolving