Which sentence describes deposition changing the surface of Earth? A. A river breaks away rocks to form a canyon.
B. Lava from a volcano cools to form an island.
C. A delta is formed as a river flows into an ocean.
D. A mountain range is formed as tectonic plates collide.

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction. express your answer as a chemical equation. identify all of the phases in your answer.

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

Which of the following nuclei would be the least stable a 2 protons, 2 neutrons b 1 proton 1 neutron c 1 proton 3 neutrons d 1 proton 2 neutrons