Copper (cu) is an example of what? heterogeneous mixture element homogeneous mixture compound

What is true about the element francium (Fr, atomic number 87) ? More than one can be true A) It has seven valence electrons. B) It is likely to form ionic bonds. C) It is in Period 7. D) It is nonmetal. E) It is a metal.

Determine the mass of a ball with a wavelength of 3.45 * 10-34 m and a velocity of 6.55 m/s

Your blood contains many dissolved solids. What do you think could be done if you needed to remove the water from a sample of blood in order to study the solids that remained?

In the reaction between barium nitrate and sodium sulfate which substance would be a precipitate as a product of the reaction. (Barium compounds are relatively insoluble and nitrate copounds are soluble) ?

The temperature of a 15-g sample of lead metal increases from 22 °C to 37 °C upon the addition of 29.0 J of heat. The specific heat capacity of the lead is what?

What time is used for electrons in the outermost shell or energy level

Why is nitrogen gas very unreactive?

During a class demonstration the potassium exploded. Suggest what might have caused this to happen

How would a soil that develop in a warm, wet place be different than one that develop in hot, dry place

How do halogens differ from noble gases?