Which of the following is an example of chemical energy changing into radiant energy?
a)a fireplaces glowing when lighted
b)a plant using sunlight to make food
c)a child on a swing slowing down as she swings upwards
d)a coil of a toaster glowing when the toaster is switched on

D)A coil of a toaster glowing when the toaster is switched on

Explanation:

A coil of a toaster glowing when the toaster is switched on  is an example of chemical energy changing into radiant energy.

The toaster is turning into radiant energy because it is getting warmer and cooking.

Explanation:

The reaction you are looking for is

hydrocarbon + O2 > nCO2 + mH20

in the simplest form.

You have a piece of wood. You burn it. There is going to be a chemical change.

Both heat and light are produced. (radiant energy)

The second best answer is D because you do get radiant energy.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

a:

by the combination of an unlimited number of elements