What is a atomic weight easy definition?
The total weight of an atom is called the atomic weight. It is approximately equal to the number of protons and neutrons, with a little extra added by the electrons. The stability of the nucleus, and hence the atom’s radioactivity, is heavily dependent upon the number of neutrons it contains.
What is atomic weight class 8?
Atomic weight can be defined as the average weight of an element with respect to all its isotopes and their relative abundances. Atomic weight is measured in units of atomic mass (usually abbreviated to AMU), also known as Daltons. A single element can have several isotopes.
What is the atomic mass or weight?
The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. (Atomic mass is also referred to as atomic weight, but the term mass is more accurate.)
What is molecular and atomic weight?
The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass is the sum of the masses of the atoms in a molecule.
What is atomic mass class 9?
What is Atomic Mass? Atomic mass can be defined as the total mass of one atom of any given element. The unit of atomic mass is called the unified atomic mass unit (denoted by ‘u’). Most of the atomic mass of a substance is made up of protons and neutrons. Therefore, it is almost equal to its mass number.
What is formula of atomic mass?
Atomic mass can be calculated by the sum of the mass number of protons, electrons, and neutrons. We can determine the relative atomic mass of an atom also with the help of atomic mass. It is calculated by the average mass of the isotope of that element divided by the mass of the Carbon – 12 atom.
What is atomic mass class 12?
Atomic mass in an atom or group of an atom is the sum of the masses of protons, neutrons and electrons.
What is the definition of atomic mass Class 12?
An atomic mass unit is defined as accurately 1/12 the mass of a carbon-12 atom. The carbon-12 atom has six neutrons and six protons in its nucleus. It is represented as a.m.u or u (unified). It is a unit of mass used to express atomic masses. 1 a.m.u is the average of the proton rest mass and the neutron rest mass.
What is molecular weight class 11?
Molecular weight – the sum of atomic masses of all atoms in a molecule is known as molecular weight.
How do you remember the atomic weight?
To remember the atomic masses of all the elements,you will have remember all the elements first… If you can remember the atomic number of all the elements,then it will be ease to remember their atomic masses. we can remember all the elements from periodic table. From the periodic trends of the elements.
Does atomic weight mean density?
Atoms with a lower atomic mass have a greater density than the atom with the higher atomic weight because the atoms are tightly packed together. The volume of a material can change with temperature and pressure. This can also modify the density of the material.
What is the difference between atomic number and atomic weight Class 8?
Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element’s nucleus. It is the average weight of an element.
What is called molecular weight?
Molecular weight is a measure of the sum of the atomic weight values of the atoms in a molecule. Molecular weight is used in chemistry to determine stoichiometry in chemical reactions and equations. Molecular weight is commonly abbreviated by M.W. or MW.
What’s in molecular weight?
molecular weight, also called molecular mass, mass of a molecule of a substance, based on 12 as the atomic weight of carbon-12. It is calculated in practice by summing the atomic weights of the atoms making up the substance’s molecular formula.