Question

the periodic table | atoms, elements, and the periodic table | high school chemistry | khan academy
carrie armogan
the periodic table | atoms, elements, and the periodic table | high school chemistry | khan academy
khan academy organic chemistry
groups
periods
alkali metals
alkaline earth metals
metals vs. nonmetals
noble gases
metalloids
multiple - choice question
which of the following are true about alkali metals (select all that apply)
highly reactive
react with water
not reactive
not found in nature in their pure state
do not combine with other elements
rawatch
submit

Explanation:

Alkali metals (Group 1 elements like Li, Na, K) have one valence electron. This makes them highly reactive (they readily lose that electron). They react with water (e.g., \(2Na + 2H_2O=2NaOH + H_2\uparrow\)). Due to their high reactivity, they are not found in nature in their pure state (they exist as compounds). The statement "not reactive" is false as they are reactive. The statement "Do not combine with other elements" is false as they readily combine (e.g., NaCl, KCl).

Answer:

highly reactive, React with water, Not found in nature in their pure state