Elements on the periodic table are organized by what?

increasing atomic number

decreasing atomic mass

increasing valence electrons

decreasing neutron count

A sample of phosphonitrilic chloride, PNCl2, contains 0.170 mol of the compound. What is the mass of the sample, in grams?

Which of the molecules in the figure has the most carbon atoms? Which of the molecules in the figure has the most carbon atoms?

Convert 1.8 moles of potassium to atoms

How much heat (in kj) is released when 3.600 mol naoh (s) is dissolved in water? (the molar heat of solution of naoh is â445.1 kj/mol.) ?

A 7.100 L sample of gas is cooled from 73.0 °C to a temperature at which its volume is 5.700 L. What is this new temperature? Assume no change in pressure of the gas.

A nickel atom (Ni) has a mass numbet of 61. how many neutrons does the atom have

Select the more electronegative element in each pair. a. Cl or Fb. Se or Oc. N or Asd. Na or Mg

Find the molar mass of potassium dichromate, K2Cr2O7

Zn (s) + cu2 + (aq) →zn2 + (aq) + cu (s). part a under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 51.0 g of copper is plated out?

13 This word describes the circulatory system that provides nutrients and oxygen to living cells of the body.