A magnetic field protects Earth from the Sun's high-energy particles. What two processes are involved in the formation of Earth's magnetic field?

the movement of materials in Earth's mantle and Earth's rotation

the movement of metals in Earth's core and Earth's rotation

the movement of solar wind toward Earth and Earth's revolution

the movement of eruptions from the Sun's surface and Earth's revolution

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.