What determines the order of placement of the elements on the modern Periodic Table?

1. atomic number

2. atomic mass

3. the number of neutrons, only

4. the number of neutrons and protons

This type of heat transfer is trapped in green houses. Conduction, Convection, Or Radiation and why is it conduction, convection, or radiation?

A chemist weighed out 65.8 g of potassium. Calculate the number of moles of potassium she weighed out. Round your answer to 3 significant digits.

Which property of water is likely to most significant in water's role ad a universal solvent? a. water molecules have positive and negative sides. b. water molecules have covalent bonds. c. water contains oxygen atoms. d.

Which of the following is not an atom A. Nitrogen B. copper C. Carbon dioxide D. Aluminum

Is Radium 226 dangerous to humans?

What is the mass of 3 L of water vapor at 120◦C and 388 torr?

List three things you would need to consider to determine whether or not a chemical system is at equilibrium?

How many moles of methane gas molecules, CH4, are in 11.2 liters of methane at standard conditions? a. 11.2 moles b. 27.2 moles c. 179.2 moles d. 0.5 moles

The valve between a 2.00-L bulb, in which the gas pressure is 1.80 atm, and a 3.00-L bulb, in which the gas pressure is 3.40 atm, is opened. What is the final pressure in the two bulbs, the temperature remaining constant?

What determines the order of placement of the elements on the modern Periodic Table? 1. atomic number 2. atomic mass 3. the number of neutrons, only 4. the number of neutrons and protons