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3 years ago

How to know whether something is an "atom" or not? for example

1 answer:

6 0

A normal atom has a neutral charge with equal numbers of positive and negative particles. That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons.

Butane is a straight chain alkane composed of 4 carbon atoms. It has a role as a food propellant and a refrigerant. It is a gas molecular entity and an alkane.

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Owls do most of their hunting during the night and they have specialized cells in their eyes that provide good night vision. The

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C) They have a large number of rods and small number of cones.

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3 years ago

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Definiton of atomic mass unit and the name of the atom mass it is on.

Natali5045456 [20]

Atomic mass is the total mass of neutrons and protons in a certain isotope. It is usually called: AMU or atomic mass unit.

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2 years ago

How do the functions of the two groups of peripheral nerves differ?

gizmo_the_mogwai [7]

Answer:

One moves the arm one moves the legs???

Explanation:

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2 years ago

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Which of the four cars had the least net force applied to it when it was launched down the ramp

castortr0y [4]

The least net force applied : Car 3(12 N)

<h3>Further explanation </h3>

Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object

∑F = m. a

Car 1 ⇒m=0.5 kg, a=36 m/s²

$\tt \sum F=0.5\times 36=18~N$

Car 2⇒m=0.8 kg, a=50 m/s²

$\tt \sum F=0.8\times 50=40~N$

Car 3⇒m=0.6, a=20 m/s²

$\tt \sum F=0.6\times 20=12~N$

Car 4⇒m=1, a=19~m/s²

$\tt \sum=1\times 19=19~N$

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2 years ago

SeF6 1. Lewis Structure 2. Perspective drawing 3. Number of atoms bonded to central atom 4. Number of non-bonding electron pairs

Anarel [89]

The answer is- $SF_{6}$ is octahedral in electronic and molecular geometry with 6 Fluorine atoms bonded to central atom S.

Lewis structures are the diagrams in which the valence electrons of the atoms of a compound are arranged around the atoms showing the bonding between the atom and the lone pair of electrons existing in the molecule.

Determine the molecular geometry of $SF_{6}$ .

Valence Shell Electron Pair Repulsion theory is commonly known as VSEPR theory and it helps to predict the geometry of molecules.
According to this theory, electrons are arranged around the central atom of the molecule in such a way that there is minimum electrostatic repulsion between these electrons.
Now, calculate the total number of valence electrons in $SF_{6}$ .

$Valence\ electrons\ in\ SF_{6}= Valence\ electrons\ in\ S +\ 6(Valence\ electrons\ in\ F)$

Valence electrons of S = 6

Valence electrons of F = 7

Thus, the valence electrons in $SF_{6}$ are-

$Valence\ number\ of\ electrons\ in\ SF_{6} = (6) + 6(7) = 48\ electrons.$

The Lewis structure of $SF_{6}$ is - (Image attached).
In the structure, the number of atoms bonded to central atom (S) = 6.
Number of non-bonding electron pairs on the central atom = 0 (as all the valence electrons are bonded to F).
Electronic geometry in case of 6 bond pairs is octahedral.
Molecular geometry us also octahedral with bond angles 90°.
Central atom is sp3d2 hybridised.
$SF_{6}$ is a non-polar molecule.

To learn more about Lewis structures visit:

brainly.com/question/12307841?referrer=searchResults

#SPJ4

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8 months ago