M4 Reflection

CHM 010 Virtual Lab: Identifying elements by their properties. Background:  Elements are generally divided into 3 main groups within the periodic table -­‐ metals, nonmetals and metalloids. All elements have certain properties. For example, most metals are hard shiny solids. They are good conductors of electricity and heat. Metals are also malleable and ductile. Most nonmetals are gases at room temperature. Solid nonmetals are dull and neither malleable or ductile. Nonmetals are poor conductors on electricity and heat. Some elements have properties of both metals and nonmetals. These elements are called metalloids or semi-­‐metals. Problems: In this virtual lab you will test mystery elements to discover their properties. You will use what you know about the properties of these elements to determine what they are. 1) Compare and contrast the properties of the elements. 2) Identify elements based on their properties. Hypothesis: Which test (property) is most helpful for determining the…

Is the underlined part of the macroscopic domain, or the microscopic domain of chemistry ? A carbon atom has 6 protons, 6 neutrons and 6 electrons.

Chemistry of Mars NASA's 1997 mission to Mars included a small robot, the Sojourner, that analyzed the composition of Martian rocks. Magnesium oxide from a boulder dubbed "Barnacle Bill" was analyzed and found to have the following isotopic composition: Mass (u) Natural Abundance (%) 39.9872 78.70 40.9886 10.13 41.9846 11.17 If essentially all of the oxygen in the Martian MgO sample is oxygen-16 (which has a mass of 15.9948 u), is the average atomic mass of magnesium on Mars the same as on Earth (24.31 u)?

Explain how figure 2-7 would be different if it illustrated carbon-14 instead of carbon-12.

Can i get some help with this problem?