Which element has both metallic and nonmetallic properties?

(1) Rb (3) Si

(2) Rn (4) Sr

Which statement best describes electrolysis? Electrolysis stores electrons in an aqueous solution. Electrolysis converts chemical energy into electrical energy. Electrolysis separates protons and electrons in an electrolyte.

Which best describes the act of using senses or tools to gather information? creating a hypothesis making an observation summarizing the results recording the measurements

Name a plant that is vascular, produces flowers, reproduces with seeds, and has two cotyledons.

An atom of helium-4 differs from an atom of lithium-7 in that the atom of helium-4 has?

The group in an experiment that is not exposed to the teased variable is called the _ group

Compare and contrast the outer core and the inner core.

What colors make the color turquoise?

12.23 g of ammonia (NH3) are dissolved in enough water to make 560.0 mL of solution. How many moles of NH3 are added to the water?

According to the ph scale, what is the approximate ph of acid rain? a. 4.0 b. 4.5 c. 5.0 d. 5.5

You find a little bit (0.150g) of a chemical marked Tri-Nitro-Toluene, and upon combusting it in oxygen, collect 0.204 g of CO2 and 0.030 g H2O (we'll assume that these are the products, along with nitrogen).