Atomic number 2 is Helium, which has the symbol He
Its atomic number is 2. That's what makes it the second element.
Atomic number represent protons. protons are in the atom. Helium got the atomic number 2.
The answer is: Helium (He).
The atomic number of sulfur is 16 The number of protons is the same as the atomic number. The S-2 gains 2 electrons so it changes from 16 to 18. The atomic mass is 32. The atomic mass number minus the number of protons will give you 16 which is the number of neutrons. :)
Electron (beta minus) decay: the atomic mass remain approx. constant, the atomic number will be greater with 1 Positron (beta plus) and electron capture decay: the atomic mass remain approx. constant, the atomic number decrease with 1 Double beta decay: the atomic mass remain approx. constant, the atomic number will be greater with 2
Mass number is the sum of neutrons and protons. It is equals to total of their weights. As an example hidrogen-2 (deuterium) has a mass number of 2.
Stats for helium:Atomic number: 2Atomic mass: 4.002Protons: 2 (the same as the atomic number)Electrons: 2 (same as the number of protons)Neutrons: 2 (usually)Symbol: He
this elemnt has an atomic number that is double the atomic number of silicon?
The atomic number for helium is 2.
The atomic number of helium is 2. It has 2 protons in its nucleus, which defines its atomic number.
The element is Helium witht he atomic number, 2.
the atomic number is 2
Its atomic number is 2.
The atomic number of Helium is 2.
Helium is a gas element. atomic number of it is 2.
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
The atomic number of ununtrium is 113; the atomic number of helium is 2. 1132=12 769
You subtract the atomic number from the atomic weight. For example, if you have a helium atom and its atomic weight is 4 and you subtract its atomic number (2) the number of neutrons in the helium atom is 2.
Helium is a gas element. atomic number of it is 2.
Calcium has the atomic number 20.