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3 years ago

Which element is the first element in group 13 of the periodic table of elements?

Chemistry

2 answers:

joja [24]3 years ago

8 0

Answer:

Boron

Explanation:

Vlad [161]3 years ago

6 0

Answer:

Boron

Explanation:

Boron is the first element of Group 13 and is the only metalloid of the group. Its chemical symbol is B, and it has an atomic number of 5. Boron has the electron configuration [He] 2s 2 2p 1 and prefers an oxidation state of +3. Boron has no natural elemental form; it forms compounds which are abundant in the Earth's crust.

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What is the difference of a mineral and a gem?

Citrus2011 [14]

A gem is a crystalized mineral.

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3 years ago

Many types of scientific equipment are used to perform different functions in the science lab. Which of the following combinatio

alisha [4.7K]

The scientific instruments used to heat water to 85 degree Celsius has been graduated cylinder, beaker, thermometer, and hot plate. Thus, option B is correct.

Scientific equipments have been defined as the instruments and glassware that has been used in the scientific study and experimentation.

<h3>Equipments for heating the water</h3>

The water has been heated to the temperature of 85 degrees Celsius. The temperature has to be monitored thus, a thermometer has been used.

The water has been measured to be 1 L, thus the graduated cylinder, and beaker has been used for the measurement and heating of water.

The heat has been provided to the beaker by placing it on a hot plate.

Thus, the scientific instruments used to heat water to 85 degree Celsius has been graduated cylinder, beaker, thermometer, and hot plate. Thus, option B is correct.

Learn more about scientific equipments, here:

brainly.com/question/24690874

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3 years ago

Read 2 more answers

The electronegativity of C = 2.5, O = 3.5. What type of bond is between C-O? ______ ______ bond

Schach [20]

Answer:

Polar covalent bond

Explanation:

On the basis of electronegativity bond could be ionic bond, polar and non pole covalent bond.

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. The electronegativity difference between bonded atoms is greater than 1.7.

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. Both atoms are bonded together electrostatic attraction occur between anion and cations.

Covalent bond:

It is formed by the sharing of electron pair between bonded atoms.

The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive. There are two type of covalent bond. Polar and non polar covalent bond. When electronegativity difference is 0.4 - 1.7 bond is polar covalent bond when it is less than 0.4 the bond is non polar covalent.

For example:

In CO the electronegativity of oxygen is 3.5 and carbon is 2.5. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and carbon becomes partial positive. and bond is polar covalent.

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3 years ago

In a particular redox reaction, clo2– is oxidized to clo4– and ag is reduced to ag. complete and balance the equation for this r

Klio2033 [76]

To write a complete balanced reaction of a redox reaction, we need to know the half reactions of the molecules involved in the reaction and to balance these reactions. From, the problem statement ClO2- is oxidized to ClO4- so the half reaction would be:

(ClO)2- = (ClO)4-

To balance,
We first balance the elements except O and H in the reaction.
(ClO2)- = (ClO4)-
Then, we balance O by adding H2O and balance H by adding H+
(ClO2)- + 2H2O = (ClO4)- + 2H+
Then, we balance the charges by adding electrons,
(ClO2)- + 2H2O = (ClO4)- + 2H+ + e-

Then for Ag+ to Ag,
Ag+ = Ag

We just need to balance the charge,
Ag+ + e- = Ag

To determine the final equation, we add both half reactions:

(ClO2)- + 2H2O = (ClO4)- + 2H+ + e-
Ag+ + e- = Ag
--------------------------------------------------------
<span>ClO2- +Ag+ +2H2O---> ClO4^- + Ag + 2H+</span>

3 0

3 years ago

3. When looking at a potential energy graph, how do you know if a reaction is

frosja888 [35]

Answer:

The correct answer is -

if the potential energy of reactants is less than the potential energy then it is an endothermic reaction and if the potential energy of reactants is more than the products it is an exothermic reaction.

Explanation:

The potential energy graph represents the energy change in a reaction as it progresses. In the initial part of the reaction, the energy shows are the energy of reactants that takes part in the reaction, and in the later phase, the energy has represented the energy of products of the reaction.

To find the reaction if it is endothermic or exothermic one can see if the potential energy is increased or decrease with the progress of the reaction. if the reaction is increasing in energy with the progress then it is endothermic and exothermic in less energy.

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3 years ago

Which element is the first element in group 13 of the periodic table of elements?​

Which element is the first element in group 13 of the periodic table of elements?