1b:["$","$1","0",{"children":"El alumno elegirá uno de los dos repertorios siguientes. Cada una de las preguntas se calificará con 2 puntos."}] 1c:null 1d:["$","header",null,{"className":"relative flex flex-col gap-4 border-b border-border/70 pb-6 mt-8","children":[["$","div",null,{"className":"flex items-end justify-between gap-4","children":[["$","h1",null,{"className":"flex items-baseline gap-3 sm:gap-4","children":[["$","span",null,{"className":"font-heading text-xs font-medium uppercase tracking-[0.22em] text-muted-foreground","aria-hidden":"true","children":"Ejercicio"}],["$","span",null,{"className":"font-heading font-semibold tracking-tight text-foreground text-4xl sm:text-5xl lg:text-6xl","children":"5"}],["$","span",null,{"className":"ml-1 inline-flex items-center justify-center rounded-md border border-border bg-card px-2 py-1 font-heading font-semibold text-foreground/85 text-base sm:text-lg","aria-label":"Opción B","children":"Opción B"}]]}],["$","span",null,{"className":"inline-flex items-center gap-1.5 rounded-full border border-primary/25 bg-primary/10 px-3 py-1 text-xs font-semibold tracking-wide text-primary","aria-label":"2 puntos","children":[["$","span",null,{"aria-hidden":"true","className":"size-1.5 rounded-full bg-primary"}],"2"," ","puntos"]}]]}],["$","div",null,{"className":"flex flex-wrap items-center gap-2","children":[null,null]}]]}] 21:T4c5,

7{,}99 \cdot 10^{18}

1e:["$","div",null,{"className":"mt-6 text-[17px] leading-relaxed text-foreground/95 sm:text-lg","children":[["$","$1","0",{"children":"Disponemos de una muestra de radio 226 (Ra-226) que contiene "}],["$","span","1",{"dangerouslySetInnerHTML":{"__html":"$21"}}],["$","$1","2",{"children":" átomos. Sabiendo que el Ra-226 tiene un periodo de semidesintegración de 1600 años, calcula:"}]]}] 22:T4c5,

2{,}66 \cdot 10^{18}