Answer:
A. {K}, {Ba}, {Ca}, {Na}
B. {Au}
C. {Na}
D. Image Missing
Explanation:
PART A:
The range of wavelengths in visible region is 380 nm to 740 nm. Thus, all the elements that emit light of wavelength in this region are the elements which emit radiation in visible part. They are:
{k}
{Ba}
{Ca}
{Na}
PART B:
The energy of a photon is inversely proportional to its wavelength (E = hc/λ). Therefore, the element, which emits the radiation of smallest wavelength, has the highest energy photons. <u>That element is {Au}</u>
<u></u>
PART C:
Similarly, the element which emits radiation of highest wavelength, has the lowest energy. <u>That element is {Na}</u>
PART D:
Image missing.
A catalyst is a compound that accelerates a chemical reaction without getting used up in the process.
Un catalizador es un compuesto que acelera una reacción química sin ser agotado en el proceso.
Answer:
Length*Width*Height is how you find volume.
Sheild volcanoes form from High -viscosity lava; Composite volcanoes form from low -viscosity lava.
so your answers should be B.
Answer: C. a compound in which one or more carbon atoms have double or triple bonds.
Explanation:
Saturated hydrocarbons are defined as the hydrocarbons in which single bond is present between C-C atoms. The general formula used for these hydrocarbons is . Example:
Unsaturated hydrocarbons are defined as the hydrocarbons which have double or triple covalent bonds present between carbon and carbon atoms. They are known as alkenes and alkynes respectively. The general formula used for these hydrocarbons is and respectively. Example:
Both the hydrocarbons are not soluble in water as they are non polar in nature unlike water which is polar.
Cycloalkanes are also saturated hydrocarbons as single bond is present between C-C atoms.
Thus the correct statement is An unsaturated hydrocarbon is a compound in which one or more carbon atoms have double or triple bonds.