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3 years ago

What is the electron configuration of neptunium?

1 answer:

7 0

This is the electron configuration of neptunium:
Rn 5f4 6d1 7s2
or, if you want to complicate:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f4 6d1
Since there are 93 electrons, they make up 5f4 altogether.

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Electrolysis of molten sodium chloride Products at cathode and anode? Observation?

Mekhanik [1.2K]

At the anode (A), chloride (Cl-) is oxidized to chlorine. ... At the cathode (C), water is diminished to hydroxide and hydrogen gas. The net procedure is the electrolysis of a fluid arrangement of NaCl into mechanically helpful items sodium hydroxide (NaOH) and chlorine gas.

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4 years ago

Hi friends so i rly need help in this question um plz answer

levacccp [35]

7. Average Atomic Mass
8. Atomic Number
9. Isotopes
10.Ions
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4 years ago

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Without consulting any tables, arrange the following substances in order and explain your choice of order: (a) Mg21, Ar, Br2, Ca

Olenka [21]

Explanation:

(a) When we move across a period then there occurs a decrease in atomic size of the elements due to increase in force of attraction between the protons and electrons of an atom.

On the other hand, when we move down a group then there will occur an increase in atomic size of the elements due to increase in number of electrons which will also increase number of shells.

For example, Mg and Ca are group 2 elements, Br is a group 17 element and Ar is a group 18 element.

Hence, these are arranged in order of increasing radius as Ar < Br < Mg < Ca.

(b) Ionization energy is defined as the energy required to remove the most loosely bound electron from a neutral gaseous atom.

When we move across a period from left to right then there occurs a decrease in atomic size of the atoms. Therefore, ionization energy increases along a period but decreases along a group.

Hence, order of increasing ionization energy for the given species is as follows.

Na < O < $Na^{+}$ = Ne

(c) Electronegativity is defined as the ability of an atom to attract electrons towards itself. When we move across a period then there occurs an increase in electronegativity of the atoms.

And, when we move down a group then there occurs a decrease in electronegativity of the atoms.

Therefore, for the given elements order of increasing electronegativity is as follows.

Al < H < O F

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3 years ago

Choose all the answers that apply. Which of the following is true about the sun's radiation?

yawa3891 [41]

B. It is shortwave.....

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3 years ago

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Which level of an energy pyramid has the most energy available?

VikaD [51]

7. A

The energy pyramid is simply going from the bottom having the most energy, and the top having the least. The most energy in the energy pyramid is provided by the producers. The producers are at the bottom of the energy pyramid. They are the basis of all ecosystems. The producers have the most energy because they are the ones that manage to produce food for themselves, thus they provide 100% energy, while all other levels have 10% of the previous level of the energy pyramid.

8. coyote

The trophic levels are simply divided into autotrophs, which are the ones that produce the food for themselves, primary consumers, which are feeding on the producers, and secondary consumers, which are feeding on the primary consumers. In the category of secondary consumers we have the predators. The predators are the ones that eat the primary consumers, and the coyote is falling into this category. The coyote is a predator, from the canidae family, being a carnivore that preys upon herbivores.

9. True

The invasive species are the species that have managed to reach and inhabit places that are not their native territory. This can happen in a natural way, or because of the humans. The invasive species are usually much more competitive than the native species. They manage to take their food sources, prey upon them with ease, reproduce much quicker, as well as introducing new diseases. All of that results in in easy expansion of the invasive species, while the native species decrease or even go extinct.

10. It would decrease because the greenfly population would decrease

The ladybird, or ladybug, is falling into the category of secondary consumers, thus they are predators. They feed upon small insects, mostly that are considered as pests, such as the greenfly. The greenfly is feeding on the berries. If the berry population starts to decrease, then the greenfly population will decrease as well, as the food source will be smaller. The ladybird population will too start to decrease, as the greenfly population, its prey, will be decreasing because of the decrease in the berry population.

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3 years ago