Silicon is a metalloid, an element with properties of both metals and non-metals. Silicon exists in two allotropic forms. Allotropes are forms of an element with different physical and chemical properties.One allotrope is in the form of shiny, grayish-black, needle-like crystals, or flat plates.The second allotrope has no crystal structure and usually occurs as a brown powder.ilicon exists in two allotropic forms. Allotropes are forms of an element with different physical and chemical properties. One allotrope is in the form of shiny, grayish-black, needle-like crystals, or flat plates. The second allotrope has no crystal structure and usually occurs as a brown powder.
The Summative Assessments are comprehensive end of year assessments of grade-level learning that measure progress toward college and career readiness.
Formative vs Summative Assessment. The assessment of teaching and learning can be viewed as two complementary and overlapping activities that aim to benefit both the quality of student learning and the professional development of the instructor.