In halogens, fluorine has fewer electrons and a weaker dispersion force as compared to iodine. which statement is true regarding fluorine and iodine?
a.
fluorine is a gas and iodine is a solid at room temperature.
b.
fluorine is liquid and iodine is gas at room temperature.
c.
both fluorine and iodine are gases at room temperature.
d.
both fluorine and iodine are solids at room temperature.
e.
fluorine is solid and iodine is liquid at room temperature.

There are main groups in the modern periodic table of elements

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)