That's a very vague question, but if it's the theory you're after;
If a nucleus is heavy (>82 protons, generally at A2 level) it will emit an alpha particle. For example,
238U --> 234Th + 4α + 0νe
_92______76___ 2___0
In this emission, Uranium-238 is the parent nucleus. It emits an alpha particle, which has 2 protons and 2 neutrons. Thallium-234 is the daughter nucleus. The other thing is a neutrino. It is a lepton, and is there to balance the lepton number.
Apologies for the big black line, but it's the only way I could get wikians to play nicely.
Atomic number = Number of protons
The atomic number is the number of protons in an atom of an element.
The atomic number of the element with the symbol Be (Beryllium) is 4.
The atomic number of an Element refers to it's position in The Periodic Table. The first element (Hydrogen - H) has the atomic number 1. The second element (Helium - He) has the atomic number 2. The fifty-second element (Tellurium - Te) has the atomic number 52. And so on.
The atomic number of an element is the number of protons in the nucleus of an atom of that element. It is represented by the symbol "Z" on the periodic table. The atomic number determines the element's identity and its unique properties.
Atomic number = Number of protons
The atomic number is the number of protons in an atom of an element.
Argon is a gas element. atomic number of it is 18.
The atomic number of the element with the symbol Be (Beryllium) is 4.
Atomic number is the number of protons in the atomic nuclei of the atoms of an element.
The element with the highest atomic number is Oganesson, with the atomic number 118.
No, the atomic number of an element does not change when its atom gets converted into cations or anions. The atomic number is determined by the number of protons in the nucleus of an atom, which remains the same during the formation of cations or anions.
An element's atomic number is the # of protons in its nucleus.
The atomic number of an Element refers to it's position in The Periodic Table. The first element (Hydrogen - H) has the atomic number 1. The second element (Helium - He) has the atomic number 2. The fifty-second element (Tellurium - Te) has the atomic number 52. And so on.
34
The atomic number tells you the number of protons in the nucleus of that element.
Silicon is a non meta element. Atomic number of it is 14.