Please help now with question 18. I will give you extra points. URGENT

d.) circle motion requires a force to give it a centripetal acceleration.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.