How many silicon atoms are in 1.00 g of silicon

When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a nudge on. what is the other product

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

No copying 15 pts how does a free-body diagram tell you about the net force on an object?