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3 years ago

Which statement applies to electronegativity?

Chemistry

2 answers:

dolphi86 [110]3 years ago

8 0

Answer: Electronegativity increases across a period.

Explanation:

Electronegativity is defined as ability of an atom to attract shared pair of electrons in a bond toward itself.

Electronegativity increases across the period because when we move across the period from left to right numbers of protons and electrons are increased. By increase in number of protons ,nuclear charge also increases due to which electrons present in an atom are strongly attracted towards the nucleus. And due to presence of strong nuclear charge shared pair of electrons in a bond are also attracted towards nucleus of an electronegative atom.

EastWind [94]3 years ago

6 0

I believe the answer would be A. Electronegativity increases across a period.

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Is O2 always a double bond?

Dima020 [189]

O-O single bonds and H-O single bonds in $\text{H}_2\text{O}_2$ molecules.
H-O single bonds in $\text{H}_2\text{O}$ molecules.
O=O double bonds in $\text{O}_2$ molecules.

<h3>Explanation</h3>

How many valence electrons do atoms in each molecule need for them to be stable?

Each H atom needs two valence electrons to be stable.
Each atom of an element other than H needs eight valence electron to be stable.

There are two H atoms and two O atoms in an $\text{H}_2\text{O}_2$ molecule. Atoms in each $\text{H}_2\text{O}_2$ need $2 \times 1 + 2\times 2 = 6$ more electrons to be stable.
There are two H atoms and one O atom in an $\text{H}_2\text{O}$ molecule. Atoms in each $\text{H}_2\text{O}$ molecule need $2 \times 1 + 2= 4$ more electrons to be stable.
There are two O atoms in an $\text{O}_2$ molecule. Atoms in each $\text{O}_2$ molecule need $2 \times 2 = 4$ more electrons to be stable.

How many chemical bonds in each molecule?

Each chemical bond adds one valence electron to each bonding atom. Each chemical bond connects two atoms. As a result, each chemical bond adds two valence electrons to the molecule.

Each $\text{H}_2\text{O}_2$ molecule needs $6 / 2 = 3$ chemical bonds.
Each $\text{H}_2\text{O}$ molecule needs $4 / 2 = 2$ chemical bonds.
Each $\text{O}_2$ molecule needs $4 /2= 2$ chemical bonds.

What chemical bonds are these? Again, each H atom needs only one more valence electron to be stable. It will share only one electron with O and form one H-O bond. The rest of the chemical bonds are between O atoms.

There are two H atoms in each $\text{H}_2\text{O}_2$ molecule, which form two H-O bonds. Two of the three chemical bonds in this molecule are H-O. The other is an O-O single bond between the two O atoms.
There are two H atoms in each $\text{H}_2\text{O}$ molecule, which form two H-O bonds. Both chemical bonds in this molecule are H-O. There's no O-O bond in this molecule.
There is no H atom in $\text{O}_2$ molecules. Both chemical bonds are between O atoms. However, there are only two O atoms. There must be two chemical bonds between the two O atoms. That bond will be an O-O double bond.

3 0

2 years ago

Read 2 more answers

If the human body were a car, glucose would be:

NeTakaya

If the human body were a car, glucose would be the gasoline.
Glucose gives humans energy, we basically run on glucose, among other things, the same way a car would run on gas.

8 0

2 years ago

Does anyone know how to do number 15?

vovikov84 [41]

Answer:

yes i do 980

Explanation:

i899 1/2

6 0

2 years ago

Are properties such as odor, color, density, and solubility physical or chemical properties?

storchak [24]

Physical properties- color, density, solubility.
Chemical property- odor.

You see, a physical property is any property that can be measured , and a one that describes the state of the physical system.

https://socratic.org/questions/are-properties-such-as-odor-color-density-and-solubility-physical-or-...

8 0

3 years ago

Read 2 more answers

Convert 0.00200 g into Mg and answer in scientific notation:

Masja [62]

Answer: $2.00x10^{2}$

Explanation: 1 gram is equal to 1000 Milligrams so

$0.00200g=\frac{1000mg}{1g}$

Since you go straight across its just multiplication so 0.00200x1000=200mg

To answer it in scientific notation it should just be $2.00x10^{2}$ mg

5 0

1 year ago