Chemistry 4th block
Periodic Trends Lab
The Periodic Table was developed by Dmitri Mendeleev, but over the years many different scientist have contributed to the development of the periodic table. Over many years elements were added, and as scientist discovered more elements, they noticed certain trends. The periodic table is organized in a certain way that makes it easier to identify multiple different trends. The purpose of this lab was to identify the specific trends on the periodic table. Experimental In this lab the first 36 elements form our graphs from. The information that was collected was density, melting point, boiling point, atomic radius, electronegativity, and ionization energy. This information…show more content… Density can be found by using the equation D=m/v. As the trend moves down a group on the periodic table, the density increases. As the trend moves down a period on the periodic table, the density increases until you get to group 11 where the density is at its highest. After group 11, the density begins to decrease. The melting point is defined as the temperature at which a solid becomes a liquid. There is no clear trend that is followed for melting point as the trend moves down a group. There is a correlation that shows the trend decreases as it is moving down a group but does not always follow this. There is also no clear trend for melting point as it moves across a period. There is a correlation that shows when the trend moves across a period, the melting point increases, but it does not always follow this trend.
The definition of boiling point is the temperature at which a liquid becomes a gas. The boiling point does not follow a clear trend as the trend moves down a group. There is a correlation that shows as the trend moves down a group the boiling point decreases, but does not always follow this trend. The boiling point also does not follow a clear trend as the trend moves across a period. There is a correlation that shows as the trend moves across a period the boiling point increases and then decreases, but does not follow this