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.
What is the difference between formative and summative assessment? Formative assessment The goal of formative assessment is to monitor student learning to provide ongoing feedback that can be used by instructors to improve their teaching and by students to improve their learning.