J. J. Thomson worked in the field of chemistry and proposed the atomic model theory after the discovery of the electron. He proposed the plum pudding model. Thus, option A is correct.
The plum pudding model of the atom was proposed by J.J. Thomson, after the discovery of electrons. The “plum pudding” atomic model was based on the plum cake structure where the sub-atomic particles were placed.
According to the model, the electrons being negative species were embedded as the cherries in the structure, while the protons being positive in charge were freely present in the rest of the pudding.
Therefore, Thomson proposed the “plum-pudding” atomic model.
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Answer:
the plum pudding model
Explanation:
(1) isomers of each other
(2) isotopes of each other
(3) the same compound
(4) the same hydrocarbon
Answer: Option (1) is the correct answer.
Explanation:
When two or more compounds represents same chemical formula but different arrangement of atoms in their structure are known as isomers.
Also, due to different arrangement of atoms the molecules will show different physical and chemical properties.
Isotopes are the atoms which contain same number of protons but they have different number of neutrons. So,they exhibit same chemical properties due to same number of electrons or protons.
Thus,we can conclude that in the given situation the two substances must be isomers of each other.
(2) hydrogen and sulfur
(3) lithium and fluorine
(4) magnesium and oxygen
The elements that can react to produce a molecular compound is hydrogen and sulfur
Explanation
can react to produce a molecular compound.
Further Explanation:
Covalent or molecular bond is formed when two or more non-metals share electrons between them. Such electron pairs are called bonding or shared pairs. The compounds formed as a result of these bonds are called covalent or molecular compounds.
Covalent bonds can be a polar covalent or nonpolar covalent bond. The bonds formed as a result of electron sharing between the atoms having some electronegativity difference between them are polar covalent bonds. HCl shows such type of bonding in it. The bonds formed when electrons are shared between the bonded atoms and these have no or slight difference in their electronegativities are called nonpolar covalent bonds. The bonds present in a molecule are nonpolar covalent bonds.
Another type of bonding that occurs due to the complete transfer of electrons from one atom to the other is called ionic bonding. Such a process includes the formation of charged species called ions. Ions can have positive or negative charges on them. The charged species having a positive charge are cations while those having negative charges are anions.
(1) Calcium and chlorine
Calcium belongs to group 2A of the periodic table and is highly electropositive in nature. So it loses two electrons and forms . Chlorine is highly electronegative in nature so two chlorine atoms accept the electrons donated by calcium and forms ions. Therefore is formed which is an ionic compound.
(2) Hydrogen and sulfur
Both these atoms are nonmetals. So they share electrons with each other and as a result, a covalent or molecular compound is formed.
(3) Lithium and fluorine
Lithium belongs to group 1A of the periodic table and is highly electropositive in nature. So it loses an electron to form . Fluorine is highly electronegative in nature and therefore it accepts the electrons donated by lithium and forms . Therefore LiF is formed which is an ionic compound.
(4) Magnesium and oxygen
Magnesium belongs to group 2A of the periodic table and is highly electropositive in nature. So it loses two electrons and forms . Oxygen is highly electronegative in nature so it accepts the electrons donated by magnesium and forms . This results in the formation of MgO which is an ionic compound.
Therefore a molecular compound is formed when hydrogen and sulfur react with each other.
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Answer details:
Grade: High School
Chapter: Ionic and covalent compounds
Subject: Chemistry
Keywords: covalent bond, molecular bond, cations, anions, calcium, chlorine, hydrogen, sulfur, lithium, fluorine, magnesium, oxygen, molecular compound, ionic compound.
Which changes occur when O2(g) is added tothis system?
(1) The equilibrium shifts to the right and the concentration of PCl3(g) increases.
(2) The equilibrium shifts to the right and the concentration of PCl3(g) decreases.
(3) The equilibrium shifts to the left and the concentration of PCl3(g) increases.
(4) The equilibrium shifts to the left and the concentration of PCl3(g) decreases.
Given the data from the question, the correct answer to the question is:
The equilibrium shifts to the left and the concentration of PCl₃(g) decreases. (Option 4)
This is simply defined as a state in a chemical system where there is no observable change in the properties of the system with time.
A French scientist postulated a principle which helps us to understand a chemical system in equilibrium.
The principle states as follow:
Considering the question given above, we are concerned with O₂ (i.e concentration) being added to the reaction
2POCl₃(g) + energy <=> 2PCl₃(g) + O₂(g)
According to the principle given above, if more O₂ is added, then, PCl₃ and O₂ will react to produce more POCl₃. Thus, the equilibrium will shift to the left and also PCl₃ will reduce.
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