The identity of an element is determined by A. the number of neutrons
B. the weight of the nucleus
OC. the number of electrons
D. the number of protons
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Iwll give extra points to who gets this for ! what type of reaction is this? ?

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh