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dlinn [17]
3 years ago
12

Which element has atoms in the ground state with greatest number of valence electrons?

Chemistry
1 answer:
butalik [34]3 years ago
6 0
You need a list of elements to compare.

The procedure is to wirte the electron configuration and compare the number of electrons in the valence electron shell.

I will work with this list, to show you the procedure

(1) tin

(2) sulfur

(3) arsenic

(4) fluorine


element        atomic number   number of       abbreviated electron
                                                electrons        configuration

tin                  50                       50                  [Kr]  5s^2 4d^10 5p2                 

sulfur             16                       16                  [Ne] 3s^2 3p^4

arsenic          33                       33                 [Ar] 4s^2 3d^10 4p^3

fluorine           9                          9                 [He] 2s^2 2p^5

The valence electrons are those in the last shell.

So, fluorine has 2 + 5 = 7 valence electrons, while tin has 2 + 2 = 4, sulfur has 2 + 4 = 6 and aersenic has 2 + 3 = 5.

Therefore, the answer is fluorine.
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The structure of copper is described as a lattice of positive ions in a 'sea of electrons'.
seropon [69]

Answer:

A

Explanation:

Metal atoms are held together by metallic bonds. The metallic bonds are composed of a lattice of positive ions in a 'sea of electrons'.

The metal atoms are held together by strong electrostatic attraction between the positive ions and the 'sea of electrons' leading to high melting point of metals including copper.

Similarly, when a metal undergoes stress, the layers of the metal roll over each other but the lattice remains in place. Hence for metals such as Copper, layers of atoms in the lattice can slide over each other thereby making the metal malleable.

Metals oxidize by electron loss. Since Copper is metal, it can also be oxidized to form copper ions by loosing electrons.

7 0
3 years ago
The most stable conformation of trans-1-tert-butyl-2-methylcyclohexane is the one in which:
Margaret [11]

The most stable conformation of trans-1-tert-butyl-2-methylcyclohexane is the one in which both the tert-butyl group and the methyl group are located near the equatorial position. Trans conformation are usually stable at the equatorial position to avoid the bulkyl group ( the tert-butyl group and methyl group) be together to reduce the so called Steric hindrance.

4 0
3 years ago
What is the elements​
Margaret [11]
DescriptionIn chemistry an element is a species of atom having the same number of protons in its atomic nuclei. For example, the atomic number of oxygen is 8, so the element oxygen describes all atoms which have 8 protons. In total, 118 elements have been identified.
4 0
3 years ago
Read 2 more answers
Frank has a sample of steel that weighs 80 grams. If the density of his sample of steel is 8 g/cm^3 what is the samples volume
sammy [17]

density is the mass of an object/ liquid per unit volume

formula for density is as follows

density = mass / volume

the mass of steel is 80 g

and density is 8 g/cm³

substituting the values in the equation we can find the volume

8 g/cm^{3} = \frac{80 g}{volume}

volume = 80 g/cm³ / 8 g

volume = 10 cm³

volume of the sample is 10 cm³

3 0
4 years ago
Read 2 more answers
A fictional cubed-shaped bacterium, Bacterius cubis, occupies a volume of 2.0 femtoliters. This particular type of bacteria is k
umka2103 [35]

Answer:

There are  \mathbf{8.90172 \times 10^{-14}} moles of bactoX present in a 3.0 μL sample volume that contains 7.512×106 bacterial cells

Explanation:

Given that:

The number of molecules present in one bacterial cell is 7.140 \times 10^3 molecules

and the sample  contains 7.512 \times 10^6 molecules.

Number of moles = number of molecules /Avogadro's number

where;

Avogadro's number = 6.023 × 10²³

Number of moles = \dfrac{7.140 \times 10^3}{6.023 \times 10^{23}}

Number of moles = 1.185 \times 10^{-20} moles

So;  1.185 \times 10^{-20} moles  is present in one bacteria cell

Similarly;  the sample  contains 7.512 \times 10^6 molecules.

Therefore; the number of moles present in the bactoX is = 1.185 \times 10^{-20} \times 7.512 \times 10^6

= \mathbf{8.90172 \times 10^{-14}} moles

3 0
4 years ago
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