The group of elements you are describing is b. alkali metals. Alkali metals, which include lithium, sodium, potassium, rubidium, cesium, and francium, are known for being very reactive with air and water, having relatively low melting points, and being soft enough to be cut with a knife.
29. Which group of elements on the periodic table are very reactive with air and water, have relatively low melting points, and are soft enough to cut with a knife?
a. halogens
c. metalloids d. noble gases
3
a.
b. alkali metals
1 answer