Atomic Essays

You may have noticed on the periodic table that the atomic mass of an element is usually not a whole number. That happens because of isotopes. An atom that is missing a neutron or has an extra neutron is called an isotope. They are still the same element; however, they …

“I felt like the moon, the stars, and all the planets had fallen on me.” Harry S. Truman, our thirty-third president of the United States, spoke this on April 12, 1945. This was a significant day in which two major things happened; President Franklin D. Roosevelt died unexpectedly, and Harry …

1. Decide how many valence (outer shell) electrons are posessed by each atom in the molecule. 2. If there is more than one atom type in the molecule, put the most metallic or least electronegative atom in the center. Recall that electronegativity decreases as atom moves further away from fluorine …

A chemical reaction is a process in which one or more substances are chemically changed into one or more new substances. A chemical reaction may involve the motion of electrons in the forming and breaking of chemical bonds. Therefore when a chemical reaction takes place, energy is transferred to, or …

Water is an odorless, colorless, tasteless chemical compound that makes up well more than half of the human body. In addition to being prominent in the make-up of the human body, it also covers all but approximately 30% of the Earth’s surface, and can be found naturally in all three …

8.01 Lab Report FLVS The purpose of this hands-on lab is to model the concept of half-life using a sample to represent radioactive atoms. Materials 200 M&M® candies, pennies, or other small candy/item with two distinct sides shoe box or other small box with a lid. Procedure 1. Place 200 candies …