The energy required to separate the 3 protons and 4 neutrons in the nucleus of a lithium atom is 39.3 megaelectronvolts. determine the mass equivalent of this energy in universal units

The number of protons or neutrons here don't matter as the energy required is given, which is 39.3 megaelectronvolts (MeV). Using the relation 1 u = 931 MeV, we can convert it to universal mass units. This is shown below:

39.3 MeV x (1 u / 931 MeV) = 0.04221 u

Answerthe valence of an element or radical is equal to the number of positive or negative charges on the ion.

Each student aligns the edge of the object with the left edge of the ruler as shown above. all four students read the ruler with a measurement of 4.6 cm. which statement describes the data they collect? i believe the answer is: the data have poor precision and poor accuracy because of a systematic error.