A student is given a sample of matter to classify. The sample is uniform in color and texture, and can only be separated by physical means. Based on this information, the
student can determine which of the following?
The sample is a compound.
The sample is a heterogeneous mixture.
The sample is a homogeneous mixture.
The sample is an element from the Periodic Table.

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.

Select the correct location on the image identify the element that humans need to breathe. 2015 er r ights reserved