Chemistry, 09.07.2019 05:00 yere144k

Deuterium is an isotope of hydrogen. it has a mass number of two. which describes a deuterium atom? a. a nucleus of one proton and one neutron, which is orbited by one electron b. a nucleus of one proton, which is orbited by one neutron and one electron c. a nucleus of one neutron, which is orbited by one electron d. a nucleus of two neutrons which is orbited by two electrons

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Answer from: ovebrown

A. a nucleus of one proton and one neutron, which is orbited by one electron.

Explanation:

Isotopes have the same atomic number and different mass number. The atomic number is the numbers of protons in the nucleus and defines each element while the mass number is the sum of protons and neutrons in the nucleus.

An hydrogen atom with a mass number of two means that its nucleus has one proton and one neutron because the atomic number of hydrogen is 1, otherwise it wouldn’t be hydrogen, so it has 1 proton and to complete the mass number of two it must have 1 neutron.

On the other hand, the atomic model says that the nucleus is orbited by electrons. The number of electrons orbiting the nucleus is given by the atomic number. Then an atomic number of 1 means that 1 electron orbits the nucleus with one proton.

Answer from: CamBroOkaii2590

A deuterium atom has A. a nucleus of one proton and one neutron, which is orbited by one electron.

A deuterium atom is an isotope of hydrogen, so it has the same atomic number: 1. The atomic number (Z) represents the number of protons, so deuterium has 1 proton.

A deuterium atom has a mass number (A) of 2. Since A is the sum of Z and the number of neutrons, the number of neutrons in one atom of deuterium is:

$A = Z + n\\n = A - Z = 2 -1 = 1$

It has 1 neutron.

Neutrons and protons are in the nucleus, orbited by electrons. Deuterium is neutral so it has the same number of electrons (negative charges) as protons (positive charges). Thus, it has 1 electron.

A deuterium atom has a nucleus of one proton and one neutron, which is orbited by one electron.

You can learn more about the atomic structure here:

Answer from: Quest

In meteorology, a cloud is an aerosol consisting of a visible mass of minute liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body. nephology is the science of clouds, which is undertaken in the cloud physics branch of meteorology.cirrus clouds usually describe clouds high in the atmosphere that can include wispy clouds, typically with ice crystals. variations include cirrus, cirrocumulus and cirrostratus as defined by the cloud's position in the atmosphere.layered stratus clouds have both flat tops and bases, and can appear as if they take up the whole sky, stretching from horizon to horizon. other combinations and variations include stratus, stratocumulus, nimbostratus and altostratus.cumulus clouds often pile up in multiple layers of the atmosphere, representing clouds that develop vertically. cumulus clouds often look like pillars with anvil-type tops or columns of clouds stacked vertically. variations include cumulus, cumulus-congestus, cumulonimbus and altocumulus.

Answer from: Quest

Yes it would be a physical change.

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Deuterium is an isotope of hydrogen. it has a mass number of two. which describes a deuterium atom?...