Studying for a test need an urgent answer I was taught that each part of an element or atom means something in the periodic table like... valence electrons identify energy levels and all that stuff Identify which each represent
Electrons:
Valence electrons:
Neutrons:
Protons:

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

The ozone hole appears in antarctica during

Lightning is an example of what phenomenon? a release of a large amount of energyan absorption of a large amount of energya natural electric circuita natural electric current