Two highly reactive elements in period 2 are the metal lithium an the A)metaloid
B)nonmetal selenium
C)nonmetal fluoride
D)nonmetal krypton

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

How many significant figures are in the following numbers ? a. 0.0002030 b. 2.000 c. 2.008900 d. 145.00

Consider the following system at equilibrium. caco3(s) = ca2+(aq) + co32-(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? occia co2 cuso4 na2co3