Which of the following properties of silicon (Si) is the most important in determining its physical and chemical properties? Select one: O Silicon is a brittle solid at room temperature. O Silicon has a low reactivity O Silicon has four valence electrons O Silicon is a metalloid

Why is the vapor pressure of a warm lake higher than the vapor pressure of a cold lake? o a. warm water has a greater heat of vaporization. ob. warm water evaporates more quickly. cool water evaporates more quickly. od. cool water has a greater heat of vaporization.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Word equation for k(s) +h2o(l) yield koh (aq) + h2