Based on what basis the elements had been arranged in the modern periodic table?
A - The increase in the atomic mass
B – The increase in the atomic number
C - The classification of elements into metals and
nonmetals
D - The classification of elements according to their

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

Predict the relative bond lengths of the three carbon-oxygen bonds in the carbonate ion (co2−3). what would you expect the charge to be on each oxygen? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.