masa atómica

masa atómica

The weight of an atom as expressed in atomic mass units (amus).

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número de masa atómica

Astronomy; General astronomy

The total number of protons and neutrons in an atom's nucleus. For example, oxygen-16 has a mass number of sixteen, because it has eight protons and eight neutrons.

número de masa atómica

Geography; Physical geography

Número total de protones y neutrones de un átomo .

constante de masa atómica (mu)

Astronomy; General astronomy

One-twelfth the mean mass of an atom of carbon 12 (including the orbital electrons.)

unidad de masa atómica (u, dalton)

Astronomy; General astronomy

The masses of atoms and molecules are generally given in atomic mass units. These units are based on a scale in which the mass of carbon 12 is taken to be 12. Atomic masses were ...

unidad de masa atómica (uma)

Physics; General physics

Es igual a un doceavo de la masa del isótopo de carbono 12, 1 uma = 1.66x 10-27 Kg.

patógeno

Biology; Ecology

A microorganism that makes its host sick. Certain viruses, bacteria, and authoritarian flag-waving fanatics are common examples of pathogens. They tend to be parasites that weaken ...

proteína

Biology; Ecology

Extremely complex molecules of carbon, hydrogen, nitrogen, and other elements joined in chains of amino acids (peptides). Protein constitutes the bulk of living matter, gives it ...

eucariota

Biology; Ecology

An organism with a membraned cell nucleus. See Prokaryote.

organogénesis

Biology; Ecology

The start of organ formation in the embryo.

porosidad

Biology; Ecology

The amount of space within rocks or soils.

selva

Biology; Ecology

An evergreen forest growing in a wt, humid climate. Rainforest coverage prevents desertification and drought and hosts more than half the world's animal species. Every day ...

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