B6. How old is an object with a molar ratio of 15% bismuth-210 to 85% Thallium-206? A. 5 days B. 10 days C. 15 days D. 20 days

Steps 1-5 to lighting a Bunsen burner

What kind of energy can be mainly excited by us/visible light

Based on its location in the periodic table, what can most likely be predicted about phosphorus? It has three valence electrons available for bonding. It has three nonbonding electrons. It has five valence electrons available for bonding.

A skier at the top of a mountain is kinetic or potential

Which formula is an ionic compound?

A change of state requires the addition or removal of heat energy. True False

Trevor watches as a freight train passes. He counts eight identical black railroad cars, then a red car, followed by several more black cars.

How long does a hydrogen bond last in water

If the body temperature of a person is recorded as 37°c, what is the person's body temperature in k? round your answer to the nearest whole number.

Pf3cl2 is a nonpolar molecule. based on this information, determine the f-p-f bond angle, the cl-p-cl bond angle, and the f-p-cl bond angle. enter the number of degrees of the f-p-f, cl-p-cl, and f-p-cl bond angles, separated by commas (e. g.