0
Atomic number 2 is Helium, which has the symbol He
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoIts atomic number is 2. That's what makes it the second element.
Wiki User
∙ 9y agoAtomic number represent protons. protons are in the atom. Helium got the atomic number 2.
Wiki User
∙ 11y agoWiki User
∙ 13y agoThe answer is: Helium (He).
Add your answer:
Earn +20 pts
What is the atomic number of S-2?
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. :)
What changes in atomic number and mass number occur in beta emission?
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
What is a example of a non atomic number?
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.
What is the atominc number the atomic mass the number of protons neutrons and electrons in an atom of neon?
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 element has an atomic number that is double the atomic number of silicon?
this elemnt has an atomic number that is double the atomic number of silicon?
What is the atomic number of He plus?
the atomic number is 2
What is the atomic number of He?
Its atomic number is 2.
What is the atomic number of this element of He?
The atomic number of Helium is 2.
What is the atomic number for helium?
The atomic number of Helium is 2.
What is the atomic number for He?
Helium is a gas element. atomic number of it is 2.
What is the atomic number of this element helium?
The atomic number of helium (He) is 2.
What is the atomic number of a helium atom?
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
What is the atomic number of ununtrium to the power of the atomic number of helium?
The atomic number of ununtrium is 113; the atomic number of helium is 2. 1132=12 769
What are First four steps of He fusion after Be?
The first four: 1. Be 2. C 3. O 4. Ne How I found this: Since Helium (He) has an atomic number of 2, add two to the atomic number of Be. Since the atomic number of Be is 4, and the atomic number of Helium is 2, you would add four plus two, which equals six. Carbon has an atomic number of six, so therefore it would be your next answer. The formula is the atomic number of Helium plus the atomic number of element you are provided with equals the atomic number of your answer. In simpler terms: atomic number of He+atomic number= atomic number of answer
How can you figure out the number of neutrons in an atom?
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.
Why does helium have an atomic number of 2 and atomic mass of 4?
An atom's atomic weight is the total of all protons and neutrons in its nucleus. Helium almost always contains two protons and two neutrons. Therefore, its atomic weight is 2 + 2 = 4.
What is heilum's atomic number?
Helium is a gas element. atomic number of it is 2.
