In this case, the number 209 represents the sum of protons + neutrons.
well i don't know ask your science teacher
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.
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.
One atom of scandium typically contains a total of 45 subatomic particles - 21 protons, 24 neutrons, and 21 electrons.
Calcium atoms have 20 protons and 20 electrons. The number of neutrons varies with the isotope.
The total number of subatomic particles in the nucleus
False; the atomic number is the total number if protons in the nucleus only.
well i don't know ask your science teacher
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.
Atomic Mass units =]
Jesus Murphry(;
A neutral nitrogen atom has 7 protons and 7 neutrons in its nucleus and 7 electrons in orbitals around the nucleus.
Helium has two neutrons and two protons in its nucleus.
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.
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.
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.
One atom of scandium typically contains a total of 45 subatomic particles - 21 protons, 24 neutrons, and 21 electrons.