1. Analyze Element A and Element B by describing how to test 3 physical or chemical properties of the elements. 2. Explain how those results could be used to determine if they are a metal or nonmetal.

3. Based on these tests, identify Element A and Element B as metal or nonmetal.

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

What is avogadro’s number, and why is it useful

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?