If you have a 4.0 g of radioactive substance left after 4 half-lives have passed then how much did you have originally?

25 g

50 g

64 g

10 g

Look at the data table and graph for the 25-coil electromagnet. With the 1.5 V battery, the electromagnet picked up an average of 6 paper clips, and with the 6.0 V battery, it picked up an average of 23 paper clips. a.

A Y particle is a what

An element has 6 valence electrons available for bonding which group of the periodic table does the element most likely belong to? group 2 group 4 group 16 group18

Write the proper word equation for the following chemical reaction: 2Fe (s) + 3F2 (g) 2FeF3 (s).

What is a isotope?

Enter a chemical equation for LiOH (aq) LiOH (aq) showing how it is an acid or a base according to the Arrhenius definition. Consider that strong acids and bases dissociate completely. Express your answer as a chemical equation.

Percent copper in brass lab

Which statement best describes Rutherford's model of the atom?

If a net force of 5.0 forward acts on a 0.60 kg toy car, what is it's acceleration?

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing chromatography sorting