Paul’s science class fills an ice cube tray with water. the tray is placed in a freezer for a day. the water freezes forming ice. the tray is removed from the freezer and left on a counter for a day. what changes as the water freezes to ice and then melts back into liquid water? a) mass of the water molecules eliminate b) number of water molecules c) volume of water in the tray d) amount of energy in the water

The modern periodic table has groups.

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world