answersLogoWhite

0

Mass NumberProtons and neutrons are collectively called called nucleons. The number of nucleons (protons plus neutrons) in the nucleus of an atom is called the mass number.

For example, Lithium has 3 protons and 4 neutrons in its nucleus. It's mass number is 7 (3+4). The mass number usually goes in front of the atomic symbol and in superscript, such as 7Li.

The answer is not Atomic Mass or atomic weight. Although atomic mass and atomic weight are slightly different measures, they both describe averages. To determine the total number of nucleons in an atom, you need to isolate a specific isotope and add together the number of protons and neutrons.

See the Related Questions below for how to find the number of protons, neutrons and electrons in any atom.

User Avatar

Wiki User

13y ago

What else can I help you with?

Continue Learning about Chemistry

Is this statement correct atoms are made up of nucleus and electrons composed of protons whose number is called the atomic number and neutrons whose numbers added together make the mass number?

It's close, but an atom is made of a nucleus and electrons. The nucleus is made of protons and neutrons. The number of protons equals the atomic number of the element, and the atomic mass is the number of protons plus neutrons.


What is the number of protons and neutrons called?

The number protons in an atom is called the atomic number (it is this number that tells us which element the atom is). The number of neutrons in an atom can change, but the term for the amount of neutrons is called an isotope. The number of protons and neutrons added together is called the atomic mass.


How many protons are in a lithium nucleus?

The atomic number of lithium is 3. Therefor there are 3 protons and neutron in the nucleus of lithium. Lithium also has 4 neutrons. atomic # = protons and neutrons neutrons = rounded atomic mass - atomic number Sources- 7th grade Acc. Science


How are electrons protons and neutrons positioned within an atom?

Electrons are on the outside rings of an atom. neutrons and protons are together in the nucleus of the atom. There is always the same number of protons and electrons in an atom, equal to the atomic number of the element. The amount of neutrons varies, even between atoms of the same number, these varieties of an element are called isotopes. If the amount of protons and electrons varies, it is called an ion, and the chemical number is still equal to the amount of protons.


The mass number of an atom indicates the number of what?

The mass number is the sum of protons + neutrons.

Related Questions

Total number of particles in the nucleus is called what?

There are two types of particles in the nucleus of an atom, which are the Protons and the Neutrons. The number of particles in the nucleus depends what is the element. For example, Oxygen has 8 protons and 8 neutrons in the nucleus and Phosphorus has 15 protons and 16 neutrons in the nucleus.


What is the sum of the protons and the neutrons in a nucleus called?

Mass number


What particles are added together to determine atomic mass?

The atomic mass of an atom is determined by the sum of the number of protons and neutrons in its nucleus. Protons have a positive charge, and neutrons have no charge. The total number of protons and neutrons in an atom's nucleus is called its mass number.


What is the total number of protons and neutron's in an atom called?

mass number = protons + nuetrons


Is this statement correct atoms are made up of nucleus and electrons composed of protons whose number is called the atomic number and neutrons whose numbers added together make the mass number?

It's close, but an atom is made of a nucleus and electrons. The nucleus is made of protons and neutrons. The number of protons equals the atomic number of the element, and the atomic mass is the number of protons plus neutrons.


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

All elements have neutrons and protons within the nucleus.


The mass number is used to calculate the number of what?

The number of protons and neutrons in the nucleus


What is the number of protons and neutrons called?

The number protons in an atom is called the atomic number (it is this number that tells us which element the atom is). The number of neutrons in an atom can change, but the term for the amount of neutrons is called an isotope. The number of protons and neutrons added together is called the atomic mass.


What is the number of protons in the nucleus of an atoms atomic?

The sum of protons and neutrons in the atomic nucleus is called "mass number"; this value is different for each isotope.


The sum of the numberof protons and nuetrons in the nucleus of an atom?

The sum of the number of the protons and neutrons in the nucleus of an atom is called as atomic mass.


Mass number - atomic number?

The mass number represents the total number of protons and neutrons in the nucleus of an atom. The atomic number specifies the number of protons in the nucleus. The difference between the mass number and atomic number gives the number of neutrons in the nucleus.


Does a nucleus have the same number of protons and electrons?

The nucleus of an atom contains only protons and neutrons; there are never any electrons in the nucleus. The number of neutrons is generally equal to or greater than the number of protons.