Sodium has the atomic number 11. how many electrons are in a sodium ion, which has the symbol na+?

Since Na has the atomic number 11, it has 11 electrons

Thus the ion Na+ has 11-1=10 electrons.

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11

Your answer is water because there is combined mass of water found on, under, and over the surface of a planet. your answer is water.