Answer:
The first energy level has 2 electrons located in the 1s-orbital and the second energy level, which in fluorine's case is the outermost energy level, has 7 electrons, 2 in the 2s-orbital and 5 in the 2p-orbitals. This means that fluorine has a total of 7 valence electrons.
Answer:
Explanation:
The equation of the reaction of Silver sulfide with aluminum in the presence of sodium bicarbonate (NaHCO₃)
3 Ag₂S(aq) + 2 Al(s) → 6 Ag (s) + Al₂S₃(aq)
option c is correct
number of electron in the outermost shell describe the reactivity if the outermost shell is completely filled its mean the reactivity of element is low and if it is completely filled then the element is highly reactive
The moutain ridge which circles the earth.