<span>В каком ряду записаны вещества только с ионной связью?</span>
<span><span>a<span>.</span></span><span> СН3СООNa, Al4C3, Na2SO4</span></span>
<span><span><span>b<span>.</span></span><span> CO, NaI3, C2H5OH</span></span></span>
<span><span><span><span>c<span>.</span></span><span> S,Al(NO3)3, O3</span></span></span></span>
<span><span><span><span><span>d<span>.</span></span><span> KCl, CaН2, НCl</span></span></span></span></span>
<span><span><span><span><span><span>Элемент, атом которого содержит 12 протонов, это</span></span></span></span></span></span>
<span>a<span>.</span></span> Mg <span>b<span>.</span></span> C <span>c<span>.</span></span> Si <span>d<span>.</span></span> Na