An atom has 13 protons in its nucleus and 11 electrons revovling the nucleus. The charge on this atom: a.
The atom has no charge .

b.
+2

c.
-2

d.
+1

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.

The amount of heat required to change liquid water to vapor at its boiling temperature is 2256 kj/kg. the amount of heat required to change liquid mercury to its vapor state at its boiling temperature is 295 kj/kg. one kg of each substance is currently at its boiling point. how will the amount of thermal energy required to change each substance from a liquid to a gas differ?