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

arsenic

B.

calcium

C.

copper

D.

bromine

E.

sodium

A dogfish shark contains 24 chromosomes in each of its muscle cells. How many chromosomes are normally found in each of its gametes

What type of glass in a window would allow the most light to come thru

When the temperature of a rigid hollow sphere containing 565 L his gas is held at 615 K, the pressure of the gas is 1,755 Kpa. How many moles of helium does the sphere contain?

34. How many hydrogen atoms are in the formula for phosphoric acid? A) 2 B) 1 C) 4 D) 3

Which is the SI unit for pressure? Pa Torr psi inHg

Which elements can be found in the sun? a. hydrogen and oxygen b. helium and oxygen c. hydrogen and helium d. hydrogen and nitrogen?

A sample of hydrogen gas at 2.0 atmospheres and 273 k occupies a volume of 5.0 liters. the gas sample is completely transferred to a 10.0-liter sealed, rigid container.

To make sure that the white powder was all sodium chloride and not mixed with sodium hydrogen carbonate, would you need to add a little less or a little more hydrochloric acid to the reaction?

A 10.0 gram sample of h2o at 23.0c absorbs 209 joules of heat. what is the final temperature

What does the sum of the protons and neutrons in an atom equal