Which characteristic of atoms is the basis for the order on the Periodic Table?

A.

reactivity

B.

atomic size

C.

atomic number

D.

mass number

Q. 11. Calculate the mass of NaBr needed to prepare a 50.00-mL aqueous solution that would yield the same conductivity as the NaCl (aq) solution. Show your calculation to your instructor before making the solution and measuring its conductivity.

What is required for electricity to flow? Explain.

A cube of iron has a temperature of 35°C. It is placed on top of a hot surface with a temperature of 175°C. What will happen to the iron? A) Its temperature will decrease. B) Heat will flow from the hot surface into the iron.

What would be the temperature change 3.0 g of water absorbed 15 J of heat

the atomic mass of chlorine is 35.45 u. Is it possible for any single atom of chlorine to have a mass number of exactly 35.45? Explain Mathematics

A solution of 3 moles of carbon disulfide in 10 moles of ethyl acetate has a vapor pressure of 170 torr at 28°c. the vapor pressure of pure carbon disulfide at 28°c is 390 torr. what is the vapor pressue of pure ethyl acetate at 28°c

What ion does a base give up

Imagine that you could hold two atoms that are bonded together, twist them, and not change the bond length. Would it be easier to twist (rotate) around a single σ bond or around a double σ plus π bond, or would they be the same?

How does the structure of a carbon atom enable it to form large molecules

A (what) forms when the sperm first fertilizes an egg