What does the 3 indicate in 1s22s22p63s1? the third shell third sublevel last shell has 3 electrons none of the above

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals

What is the source of continuous heat and energy that we receive from the sun