Choose the element that IS NOT in the same period as Potassium.

arsenic

B.

calcium

C.

copper

D.

bromine

E.

sodium

Which of the following explains why elements in column 17 (the halogens) are very reactive?

If a 30-ft3 volume of air at 10 psig is compressed to 25 ft3 at a constant temperature, what would be the new pressure in psig?

Which statement describes the charge of an electron and the charge of a proton?

Choose the substance with the highest vapor pressure at a given temperature:a. SiS2b. RbClc. CH3SCH3d. BF3e. SbH3

Which of the following represents the shortest distance? 1 inch = 2.54 cm 12 in = 1 ft 5280 ft = 1 mile a. 28.0 centimeters b. 11.0 inches c. 271 millimeters d. 0.965 feet e. 0.000155 miles

The smallest particle of a substance that still retains the properties of that substance

The reaction below demonstrates which characteristic of a base? Upper C U upper S upper O subscript 4 (a q) plus 2 upper N a upper O upper H (a q) right arrow upper C u (upper O upper H) subscript 2 (s) plus upper N a subscript 2 upper S upper O

What are two examples of decomposers

An unknown substance dissolves in water but it does not conduct electricity before or after it has dissolved.

21% of oxygen in air with barometric pressure of 625. what's partial pressure