Measurements Show That Globular Clusters Contain Very Low Amounts of Heavy

question 38

Essay

Measurements show that globular clusters contain very low amounts of heavy elements.How do scientists measure the ages of these clusters?

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Definitions:

Neutrons

Subatomic particles found in the nucleus of an atom, with no electric charge and a mass slightly greater than that of protons.

Lewis Structure

A diagram that represents the valence electrons of atoms within a molecule, illustrating the bonding between atoms and the existence of lone pairs of electrons.

Acetic Acid

A weak, organic acid that gives vinegar its characteristic smell and sour taste; used as a chemical reagent.

Lone Pairs

Electron pairs in the outer shell of an atom that are not involved in chemical bonding.