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In this case, the number 209 represents the sum of protons + neutrons.

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13y ago

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What does the mass number equal?

The total number of subatomic particles in the nucleus


The atomic number for an element is the total number of subatomic particles?

False; the atomic number is the total number if protons in the nucleus only.


Number of subatomic particles in boron?

well i don't know ask your science teacher


Number of subatomic particles in potassium?

Potassium's atomic number is 19, meaning it has 19 protons in its nucleus. In a neutral potassium atom, there are also 19 electrons orbiting the nucleus. The most common isotope of potassium, K-39, has 20 neutrons, giving it a total of 39 subatomic particles.


Which term is used to describe the way the mass of subatomic particles is described?

Atomic Mass units =]


How do scientists determine the total number of subatomic particle in a nucleus?

Jesus Murphry(;


How many subatomic particles are in nitrogen?

A neutral nitrogen atom has 7 protons and 7 neutrons in its nucleus and 7 electrons in orbitals around the nucleus.


The nucleus of a helium atom contains four subatomic particles how many neutrons does the helium atom have?

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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.


How many subatomic paricles are in 2 berylium atoms?

There are a total of 16 subatomic particles in 2 beryllium atoms. Each beryllium atom contains 4 protons and 4 neutrons in its nucleus, as well as 4 electrons orbiting the nucleus.


How many subatomic particles are in magnesium?

Anywhere from 36 to 38, however, this is assuming you are talking about neutral atoms. The variation comes from the different stable isotopes of Magnesium, of which there are three.


What is the total number of subatomic particles in one atom of scandium?

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