Uhh I don’t understand this
The alkali metals are lithium, sodium, potassium, rubidium, cesium and francium, and the alkaline earth metals are beryllium, magnesium, calcium, strontium, barium and radium. Hydrogen is placed on the periodic table<span> above </span>group<span> 1a but is not considered part of the </span>group<span>.
Refer to: </span>https://www.reference.com/.../group-1a-group-2a-elements-common-94c6bc654f3d5a4...
Radio waves, microwave, infrared, visible light, ultra violet, X-rays, gamma rays. that is lowest to highest and i no it is right mark as brainliest please
I guess d correct answer is CaCO3
