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4 years ago

Elements near the noble gases tend to form ___ bonds. A.ionic B.covalent C. Metallic

Chemistry

1 answer:

Leona [35]4 years ago

4 0

Answer:

ionic bond

Explanation:

Noble gases have complete octet. The elements near to noble gases gain electrons and get stable electronic configuration by completing the octet.

Consider the example of halogen element:

Ionic bond:

It is the bond which is formed by the transfer of electron from one atom to the atom of another element.

Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity .

For example:

Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion. Chlorine have seven valance electrons and sodium have one valance electron. To complete the octet sodium lose its one electron and chlorine accept one electron and form ionic compound.

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3 years ago

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4 years ago

Substance which allows energy to pass through it

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A substance which allows energy (heat or electricity) to pass through it is known as a conductor.

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3 years ago

In the lewis structure of ch3oh, how many bonding pairs of electrons are there?

zysi [14]

Answer:
There are five <span>bonding pairs of electrons in Methanol.

Explanation:
Those electron pairs which are being shared between two atoms in molecule are called as bonding pair electrons. While, those electron pairs which are not involved in bond formation and are not shared between two atoms are called as Non-Bonding electron pairs.
In molecule of Methanol as shown below, it can be seen that carbon atom is forming four bonds with three hydrogen atoms and one oxygen atom by sharing four electron pairs and oxygen is forming two bonds, one with carbon atom and one with hydrogen atom. There are two lone pair of electrons present on oxygen atom which are not taking part in and formation.</span>

8 0

4 years ago

A student must use 220 mL of hot water in a lab procedure. Calculate the amount of heat required to raise the temperature of 220

Inessa [10]

Answer:

64,433.6 Joules

Explanation:

<u>We are given</u>;

Volume of water as 220 mL
Initial temperature as 30°C
Final temperature as 100°C
Specific heat capacity of water as 4.184 J/g°C

We are required to calculate the amount of heat required to raise the temperature.

We know that amount of heat is calculated by;

Q = mcΔT , where m is the mass, c is the specific heat, ΔT is the change in temperature.

Density of water is 1 g/mL

Thus, mass of water is 220 g

ΔT = 100°C - 30°C

= 70°C

Therefore;

Amount of heat, Q = 220g × 4.184 J/g°C × 70°C

= 64,433.6 Joules

Thus, the amount of heat required to raise the temperature of water is 64,433.6 Joules

7 0

3 years ago