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

Differentiate between boiling and evaporation.

List 4 signs that show evidence of a chemical reaction

How does the design of Rutherford's experiment show what he was trying to find out?

The major portion of an atom's volume is (based on the gold foil experiment) ?

Lenses can be found in a variety of objects. Which example does not contain a lens? an electron microscope night vision goggles a diving mask a smart phone

When K-37 undergoes positron emission, what is the resulting atom? A) K-37 B) K-38 C) Ar-37 D) Ar-38

Consider the following reaction where Kp = 4.55*10-5 at 723 K: N2 (g) + 3H2 (g) ⇋ 2NH3 (g) a) If the three gases are mixed in a rigid container at 723 K so that the partial pressure of each gas is initially one atm, what will happen?

Which terms are used to identify pure substances? (1) an element and a mixture (2) an element and a compound (3) a solution and a mixture (4) a solution and a compound

Which of the following polyatomic ions will form an ionic compound with two sodium ions? CO32- HCO31- NO21- NO31-

What is hybridisation