4 years ago

Which of these is an organisms?

Chemistry

1 answer:

gogolik [260]4 years ago

8 0

Heart is the answer

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Which elements in group is the most reactive nonmetals

klemol [59]

Answer:

flourine

Explanation:

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1 year ago

What is the frequency for electromagnetic radiation with a wavelength of 3.10x10^-7 m?

vampirchik [111]

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3 years ago

How do you determine if and ion has a<br> noble-gasconfiguration?

Soloha48 [4]

Explanation:

Noble gas configuration is defined as the configuration which contains completely filled orbitals.

For example, oxygen atom when gain two electrons then it forms oxygen ion ( $O^{2-}$ ).

Atomic number of oxygen atom is 8 and so, its number of electrons will also be 8. But when it gain two electrons then it has total 10 electrons. Hence, electronic configuration of $O^{2-}$ is as follows.

$1s^{2}2s^{2}2p^{6}$

Since, there are completely filled orbitals in an $O^{2-}$ ions. Therefore, it means this ion has a noble-gas configuration.

Thus, we can conclude that any specie which shows completely filled orbitals will have noble-gas configuration.

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4 years ago

Return the first n>0 elements of list l. assume the list elements are numbered from 1 to n

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3 years ago

An element has an atomic number of 92 and a mass number of 234. how many neutrons does the element have? 192 142 92

GuDViN [60]

The atomic number of an element is characteristic to that element. Atomic number is the number of protons of that element.
Mass number is the sum of protons and neutrons of the element.
since protons and neutrons have a mass of 1 unit each, they together make up the mass of the element.
atomic number - number of protons - 92
mass number - number of neutrons + protons = 234
number of neutrons = mass number - atomic number
neutrons = 234 - 92 = 142
answer is 142

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3 years ago