What is the half-life of a radioisotope if a 100 g sample becomes 50 g after 20 years?
O A. 50 years
O B. 20 years
O C. 25 years
O D. 10 years
SUBMIT

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the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.