REWARDING BRAINLIEST IF THE ANSWER IS RIGHT Listed below are sets of elements.

Which group contains elements that have the following characteristics:

1) At least one is a metalloid.
2) At least one forms an ion with a charge of -2.
3) At least one is a gas.
4) At least one is a halogen

Your

a. Oxygen, fluorine, and aluminum

b. Silicon, magnesium, neon, iodine

c. Arsenic, oxygen, neon, hydrogen

d. Chlorine, sulfur, and silicon

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?