An atom has 18 protons and 8 valence electrons which statement would best identify this element

According to Le Chatelier's principle, what always happens to the equilibrium of a reaction when the temperature is reduced? A.) It shifts to the right. B.) It shifts to the left. C.) It shifts in the exothermic direction. D.

A student performed the same experiment but used radish sprouts. their data showed three peaks for the optimal ph at 2.4, 8.5, and 10.6. propose a logical hypothesis for the observed data.

How will you test for the gas which is liberated when hcl reacts with an active metal?

Which elements form an ionic compound? Check all the boxes that apply. aluminum and oxygen calcium and aluminum fluorine and oxygen lithium and fluorine

Name two common compounds that contain sodium

A laboratory experiment requires 250 millimeters of water for boiling. It also requires 100 millimeters of water for a cooling process.

Which set of procedures and observations indicates a chemical change? A) Ethanol is added to an empty beaker and the ethanol eventually disappears. B) A solid is gently heated in a crucible and the solid slowly turns to liquid.

If 100 grams citric acid react with 100 g baking soda how many grams of carbon dioxide?

What state of matter undergoes changes in volume most easily? a. solidb. liquidc. gasd. frozen

What was the result of the atomic theory?