1. What is Dalton?
2. Define atomicity.
3.What is an ion? Give one example.
4.Give three significance of mole.
5.Difine one atomic mass unit.
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1.Dalton:
a unit used in expressing the molecular weight of proteins, equivalent to atomic mass unit.
2.atomicity:
the number of atoms in the molecules of an element.
2.
the state or fact of being composed of indivisible units.
3.what is ion? example
If the number of electrons is less than the number of protons, the particle is a positive ion, also called a cation. ... A common example is nitrate, which consists of a nitrogen atom and 3oxygen atoms (NO 3 ) in the form of an anion; this is symbolized NO 3 -because it normally has a surplus of asingle electron.
4.significance of mole
1. atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material.
2. it establishes a standard for reaction stoichiometry.
3. it explains the properties of gases.
4. it provides a universally accepted standard for mass.
5. it allows us to distinguish between elements and compounds.
5.ONE ATOMIC MASS UNIT
In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass. This is approximately 1.67377 x 10 -27 kilogram (kg), or 1.67377 x 10 -24 gram (g). The mass of an atom in AMU is roughly equal to the sum of the number of protons and neutrons in the nucleus.
The AMU is used to express the relative masses of, and thereby differentiate between, various isotopes of elements. Thus, for example, uranium-235 (U-235) has an AMU of approximately 235, while uranium-238 (U-238) is slightly more massive. The difference results from the fact that U-238, the most abundant naturally occurring isotope of uranium, has three more neutrons than U-235, an isotope that has been used in nuclear reactors and atomic bombs
a unit used in expressing the molecular weight of proteins, equivalent to atomic mass unit.
2.atomicity:
the number of atoms in the molecules of an element.
2.
the state or fact of being composed of indivisible units.
3.what is ion? example
If the number of electrons is less than the number of protons, the particle is a positive ion, also called a cation. ... A common example is nitrate, which consists of a nitrogen atom and 3oxygen atoms (NO 3 ) in the form of an anion; this is symbolized NO 3 -because it normally has a surplus of asingle electron.
4.significance of mole
1. atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material.
2. it establishes a standard for reaction stoichiometry.
3. it explains the properties of gases.
4. it provides a universally accepted standard for mass.
5. it allows us to distinguish between elements and compounds.
5.ONE ATOMIC MASS UNIT
In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass. This is approximately 1.67377 x 10 -27 kilogram (kg), or 1.67377 x 10 -24 gram (g). The mass of an atom in AMU is roughly equal to the sum of the number of protons and neutrons in the nucleus.
The AMU is used to express the relative masses of, and thereby differentiate between, various isotopes of elements. Thus, for example, uranium-235 (U-235) has an AMU of approximately 235, while uranium-238 (U-238) is slightly more massive. The difference results from the fact that U-238, the most abundant naturally occurring isotope of uranium, has three more neutrons than U-235, an isotope that has been used in nuclear reactors and atomic bombs
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John Dalton________❤️❤️❤️✌️✌️
John Dalton was born in 1766 in a poor weaver's family in England.He received his early education from his father and at the Village school.Dalton started teaching in the Village at the age of 12. In 1793 ,Dalton left for Manchester to teach physics ,chemistry and mathematics in a college .In 1794, he described colour blindness. In 1808 , Dalton presented his atomic theory to explain the properties of Matter. Dalton's atomic theory of Matter became one of the foundations of modern chemistry.Dalton was the first to calculate the masses of the atoms of several elements.He died in 1844.
➡️ Dalton : A very small unit of mass , about the mass of a hydrogen atom.
➡️ Atomicity : The numbers of atoms in the molecules of an element.
➡️Ion : An ion is a positively or negatively charged atom (or groups of atoms).
For Example : Sodium ion ,etc.
➡️Three significant of mole:
▶️Mole is a link between the masses of atoms (or molecules) and the number of atoms(or molecules).
▶️A group of 6.022×10 ^23 particles ( atoms, molecules or ions) of a substance is called a mole of that substance.
▶️We can have a mole of atoms or a molecule of a substance.
➡️ Atomic mass unit : Atomic mass unit is equal to 1/12 (one-twelfth ) the mass of a carbon-12 atom.
This answer is verified ✅✅
John Dalton________❤️❤️❤️✌️✌️
John Dalton was born in 1766 in a poor weaver's family in England.He received his early education from his father and at the Village school.Dalton started teaching in the Village at the age of 12. In 1793 ,Dalton left for Manchester to teach physics ,chemistry and mathematics in a college .In 1794, he described colour blindness. In 1808 , Dalton presented his atomic theory to explain the properties of Matter. Dalton's atomic theory of Matter became one of the foundations of modern chemistry.Dalton was the first to calculate the masses of the atoms of several elements.He died in 1844.
➡️ Dalton : A very small unit of mass , about the mass of a hydrogen atom.
➡️ Atomicity : The numbers of atoms in the molecules of an element.
➡️Ion : An ion is a positively or negatively charged atom (or groups of atoms).
For Example : Sodium ion ,etc.
➡️Three significant of mole:
▶️Mole is a link between the masses of atoms (or molecules) and the number of atoms(or molecules).
▶️A group of 6.022×10 ^23 particles ( atoms, molecules or ions) of a substance is called a mole of that substance.
▶️We can have a mole of atoms or a molecule of a substance.
➡️ Atomic mass unit : Atomic mass unit is equal to 1/12 (one-twelfth ) the mass of a carbon-12 atom.
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