When an alkali metal is involved in a chemical reaction with a nonmetal, what charge will its atoms most likely form? 1- 2+ 1+ 2-

  The charge that  alkali metal   form  when they  involve in a chemical reaction with non metals  is  1+

 Explanation

Metals react   by   losing  electron to form a positively charged   ion.

 Alkali metal   has   1  electron  in outermost   sub shell  which  is donated  when they react with non metals  to form  ions with a charge of 1+.

For example sodium (Na)  metal with [Ne] 3S¹   electron configuration   donate  the  1 electron   in outermost subshell (3S) to form Na⁺ ion.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.