answersLogoWhite

0

This is the "mass number" of the atom, indicating relative mass of an isotope.

For example uranium-235 (235U) is a lighter atom than uranium-238 (238U) because while both isotopes have 92 protons (the atomic number), the first has 3 fewer neutrons.

User Avatar

Wiki User

12y ago

What else can I help you with?

Related Questions

What element is the number of protons and neutrons in the nucleus?

All elements have neutrons and protons within the nucleus.


How is the nucleus related to the periodic table?

The nucleus contains the protons and neutrons. The number of protons determines the atomic number of the element and the number of protons and the number of neutrons together determine the atomic mass.


What determines mass number?

The mass number is the sum of neutrons and protons in the nucleus of an isotope.


How do protons and neutrons relate to an elements atomic number?

Protons are positively charged particles found in the nucleus of an atom. The number of protons in the nucleus determines the element's atomic number. Neutrons are neutral particles also found in the nucleus, and together with protons, they determine the atomic mass of the element.


What does the atomic number of an atom made of?

An atomic nucleus contain protons and neutrons; protons and neutrons contain quarks and gluons.


Are neutrons the only particle that makes up the nucleus?

No, protons also make up the nucleus along with neutrons. Protons have a positive charge while neutrons have no charge. The number of protons determines the element, while the number of neutrons can vary within isotopes of the same element.


What does the atomic nucleus contains?

The atomic nucleus contains protons and neutrons, which are held together by strong nuclear forces. The number of protons in the nucleus determines the element, while the combination of protons and neutrons determines the isotope of that element. Additionally, the nucleus is surrounded by a cloud of electrons that orbit around it.


What is the relationship between the electrons and neutrons and protons?

Electrons are negatively charged, smaller than neutrons and protons, and orbit around the nucleus. Neutrons have no charge, are about the same size as protons and are found in the nucleus. Protons have a positive charge, are about the same size as neutrons and are found in the nucleus.


What is the difference between mass number and atomic number?

The mass number is the total number of protons and neutrons in an atom's nucleus, while the atomic number is the number of protons in the nucleus. The mass number determines the atom's mass, while the atomic number determines the element's identity on the periodic table.


What is the nucleus of an isotope with a certain atomic mass and number?

The nucleus of an isotope with a specific atomic mass and number contains protons and neutrons. The number of protons determines the element, while the sum of protons and neutrons gives the atomic mass. The neutrons in the nucleus help stabilize it by balancing the repulsion between positively charged protons.


One isotope for a particular element is distinguished from another by the number of?

protons and neutrons in its nucleus. The number of protons determines the element, while the number of neutrons can vary to create different isotopes of that element.


What particle determines the mass along with the protons of an atom?

Neutrons are the particles that contribute to the mass of an atom, along with protons. Neutrons have a similar mass to protons, but they do not have a charge. The number of protons and neutrons in an atom's nucleus determines its atomic mass.