mass defect

(noun)

The difference between the calculated mass of the unbound system and the experimentally measured mass of the nucleus.

Related Terms

Examples of mass defect in the following topics:

  • Nuclear Binding Energy and Mass Defect

    • A nucleus weighs less than its sum of nucleons, a quantity known as the mass defect, caused by release of energy when the nucleus formed.
    • This mass, known as the mass defect, is missing in the resulting nucleus and represents the energy released when the nucleus is formed.
    • Once mass defect is known, nuclear binding energy can be calculated by converting that mass to energy by using E=mc2.
    • First, you must calculate the mass defect.
    • Calculate the mass defect and nuclear binding energy of an atom

  • Balancing Nuclear Equations

    • To balance a nuclear equation, the mass number and atomic numbers of all particles on either side of the arrow must be equal.
    • Nuclear reactions may be shown in a form similar to chemical equations, for which invariant mass, which is the mass not considering the mass defect, must balance for each side of the equation.
    • To balance the equation above for mass, charge, and mass number, the second nucleus on the right side must have atomic number 2 and mass number 4; it is therefore also helium-4.
    • The result is an atomic mass difference of 4 and an atomic number difference of 2.
    • In order to solve this equation, we simply add the mass numbers, 214 for polonium, plus 8 (two times four) for helium (two alpha particles), plus zero for the electrons, to give a mass number of 222.

  • Congenital Heart Defects

    • A congenital heart defect is a defect in the structure of the heart and great vessels that is present at birth.
    • A congenital heart defect is a defect in the structure of the heart and great vessels which is present at birth.
    • Heart defects are among the most common birth defects and are the leading cause of birth defect-related deaths.
    • Many defects do not require treatment, but some complex congenital heart defects require medication or surgery.
    • As noted in several studies following similar body mass index (BMI) ranges, prepregnant and gestating women, who were obese (BMI ≥ 30), carried a statistically significant risk of birthing children with congenital heart defects (CHD) compared to normal-weight women (BMI= 19-24.9).

  • Defective Verbs

  • Genetic Defects from Radiation

    • Ionizing radiation from fallout can cause genetic effects, birth defects, cancer, cataracts, and other organ and tissue defects.
    • Ionizing radiation from fallout can cause genetic effects, birth defects, cancer, cataracts, and other organ and tissue defects.
    • Recognize the name of the genetic defect that has been shown to be caused by acute radiation exposure during pregnancy

  • Muscular Atrophy and Hypertrophy

    • Muscle atrophy is a decrease in muscle mass; muscle hypertrophy is an increase in muscle mass due to an increase in muscle cell size.
    • Muscle atrophy is the decrease in muscle strength due to a decrease in muscle mass, or the amount of muscle fibers.
    • Loss of muscle not due to atrophy or sarcopenia is indicative of diseases that result in structural defects of muscles (muscular dystrophy) or autoimmune responses that degrade muscle structure (myopathies).

  • Congenital Defects

    • Any substance that causes birth defects is known as a teratogen.
    • According to the CDC, most birth defects are believed to be caused by a complex mix of factors including genetics, environment, and behaviors, although many birth defects have no known cause.
    • An example of a birth defect is cleft palate .
    • Genetic diseases may be divided into single-gene defects, multiple-gene disorders, or chromosomal defects.
    • Most of these are single gene defects, usually heritable.

  • Hypergeometric (optional)

    • Suppose a shipment of 100 VCRs is known to have 10 defective VCRs.
    • The two groups are the 90 non-defective VCRs and the 10 defective VCRs.
    • The group of interest (first group) is the defective group because the probability question asks for the probability of at most 2 defective VCRs.
    • (They may be non-defective or defective. ) Let X = the number of defective VCRs in the sample of 12.
    • The sample size is 12, but there are only 10 defective VCRs.

  • Strikes

    • Strike action, also called a labor strike, is a work stoppage caused by the mass refusal of employees to work.
    • A strike action, also called labor strike, is a work stoppage caused by the mass refusal of employees to work.
    • Strikes became important during the Industrial Revolution when mass labor became important in factories and mines.
    • Are other strikers defecting from the strike?

  • Phenylketonuria (PKU)

    • Screening for PKU is done with bacterial inhibition assay (Guthrie test), immunoassays using fluorometric or photometric detection, or amino acid measurement using tandem mass spectrometry (MS/MS).
    • A rarer form of hyperphenylalaninemia occurs when PAH is normal, but there is a defect in the biosynthesis or recycling of the cofactor tetrahydrobiopterin (BH4) by the patient.
    • Tetrahydrobiopterin deficiency can be caused by defects in four different genes.