Balance the reaction and state the type of chemical reaction it is. Type your answers in blue bold font. 1. K + Br → KBr
2. HgO → Hg + O2
3. Na + H2O → NaOH + H2
4. CaO + H2O → Ca(OH)2
5. Al + HCl → AlCl3 + H2
6. NaCl + AgNO3 → NaNO3 + AgCl
7. H2CO3 → CO2 + H2O
8. PbCl2 + NaI → PbI2 + NaCl
9. NH4OH → NH3 +H2O

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Work is reduced while time is decreased