Which of the following is an example of chemical energy changing into radiant energy A- a fireplace 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 cool of a toaster glowing when the twister is switched on

A1 a 2 a 3 ooh lol i think that's it

Ihonestly don’t know how to use that one

Most elements have more than one naturally occurring isotope. as you learned previously, the atoms of those isotopes have the same atomic number (number of protons), making them belong to the same element, but they have different mass numbers (total number of protons and neutrons) giving them different atomic masses. so which mass is put on the periodic table for each element? is it the most common isotope’s mass? the heaviest mass? this activity will answer that question.