Table of Contents
Is atomic mass whole number?
The atomic masses of most elements are not whole numbers, because they are a weighted average of the mass numbers of the different isotopes of that element, with respect to their abundances in nature.
Are atomic numbers whole numbers?
Atomic number and mass number are always whole numbers because they are obtained by counting whole objects (protons, neutrons, and electrons).
Is atomic mass always a whole number True or false?
Atomic number is simply the count of protons in an atom’s nucleus, so it is always a whole number. Atomic mass is NOT a whole number, as it includes the mass of protons, neutrons, and all the other sub-atomic particles in the atom.
Why is mass number always a whole number but atomic mass fractional?
The mass number is always a whole number; because it is a count of the particles. It differs from the exact mass of the atom in atomic mass units, amu, which is often known and expressed to six decimal places.
Why is an atomic number a whole number?
For example, the atomic number of carbon is 6 – this means that all atoms of carbon, no matter what, have six protons. On the other hand, that weirdo oxygen has an atomic number of 8, indicating that oxygen atoms always have 8 protons.
Which one is atomic number and mass number?
Calculating numbers of subatomic particles The symbol for an atom can be written to show its mass number at the top, and its atomic number at the bottom.
Is equivalent whole number?
If the numerator is divisible by the denominator, the fraction is equivalent to a whole number. In other words, if you can divide the numerator by the denominator without any remainder, the fraction is equivalent to a whole number. Let’s look at the improper fraction 2/2. Yes, 2/2 is equal to the whole number 1!
What is the definition of atomic mass and atomic number?
Atomic mass indicates the size of an atom. Although technically the mass is the sum of the mass of all the protons, neutrons, and electrons in an atom, the mass of an electron is so much less than that of the other particles, that mass is simply that of the nucleus (protons and neutrons). Hydrogen (atomic number 1) is the element that has the lowest atomic mass.
What is the atomic mass of an element?
Atomic mass of an element is the average weight of the components that make up an atom. An atom is composed of protons, neutrons and electrons.
What is the atomic number?
The total number of protons in the nucleus of an atom gives us the atomic number of that atom.
What is an atomic mass?
A fundamental physical property of matter is mass. The atomic mass is referred to as the mass of an atom or a molecule. To find the average mass of atoms and molecules and to solve problems using stoichiometry, the atomic mass is used.