Alkali Metals trivia
Alkali Metals Mini Quiz
Test your knowledge with these top questions!
Potassium ion gradients help nerve cells do what?
Differences in potassium concentration across cell membranes help nerve cells generate electrical signals for communication.
Sodium ions help nerve cells transmit what?
Sodium ions crossing nerve-cell membranes change voltage, helping an electrical impulse travel along the cell.
Which isotope accounts for potassium's natural radioactivity?
Potassium-40 makes up a tiny natural fraction of potassium and decays radioactively, contributing to background radiation.
What happens when cesium contacts water?
The reaction produces cesium hydroxide and hydrogen, and the released heat can ignite the hydrogen.
What color does freshly exposed cesium metal appear?
Cesium's unusual golden tint fades quickly as the reactive metal tarnishes in air.
Sodium's symbol, Na, comes from which Latin name?
Sodium's two-letter symbol reflects a Latinized name, while the English word comes from soda.
Which ion does lithium usually form in chemical compounds?
Lithium has one valence electron and normally loses it, producing the stable Li+ ion.
How does lithium behave in room-temperature water?
Lithium is less dense than water, so it floats while its reaction releases hydrogen bubbles that cause fizzing.
Which chemical family includes lithium?
Lithium belongs to Group 1 with sodium and potassium, the elements known as alkali metals.
What color do lithium salts typically produce in a flame test?
Excited lithium ions emit red light, so lithium salts produce a crimson-red flame in flame tests and fireworks.