Question

1. a chemistry teacher provides students with this partial periodic table section and asks them to predict properties of element r: group 14 group 15 group 16 group 17 period 2 c n o f period 3 si p s cl period 4 ge as se r period 5 sn sb te i based on the periodic table model, which comprehensive prediction about element r is most accurate? r will be a nonmetal with 7 valence electrons, forming r - ions, and be very reactive. r will be a metal with 4 valence electrons, forming r 4+ ions, and have properties similar to tin. r will be a metalloid with 17 valence electrons, forming r 17 - ions, and be more reactive than iodine. r will be a nonmetal with 6 valence electrons, forming r 2 - ions, and have properties between sulfur and

Explanation:

Elements in Group 17 are halogens. They are non - metals with 7 valence electrons. They tend to gain one electron to form 1 - charged anions (X⁻) and are highly reactive. Element R is in Group 17.

Answer:

R will be a nonmetal with 7 valence electrons, forming R⁻ ions, and be very reactive.