suppose you are a geologist tasked with analyzing the fossil record in your region and determining when a major marine extinction took place. what changes in the fossil record would you look for?

What semimetal can form four single covalent bonds.

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

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