True or false The weighted average of the mass numbers of all the isotopes that
occur in nature for a particular element is the average atomic number.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent