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The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
Wiki User
∙ 12y ago
Wiki User
∙ 7y agoThe atomic number of helium is 2. Its mass is 4.002602 u ± 0.000002 u
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What atom has an atomic number 2?
Helium has the atomic number 2 and is the second most abundant substance in the universe.
What is the mass of a single atom of helium?
The atomic mass of Helium is 4.002602. The atomic mass is the combined number of protons and neutrons in the atom.
How many electrons does an atom of helium have atomic?
Helium atom has 2 electrons.
What is the atomic weight of Helium atom?
Helium atom has 2 protons and 2 neutrons (that accounts for its atomic weight). The atomic weight of helium is 4.00260
After a single subatomic particle is removed from an atom of helium the helium atom becomes an atom of hydrogen What subatomic particle was removed?
Atomic number is reduced by one.So a proton has removed.
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.
How can you figure the numbers 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.
What atom has an atomic number 2?
Helium has the atomic number 2 and is the second most abundant substance in the universe.
What that atom has 1 neutron(s) and 2 proton(s). What is its atomic number?
This isotope of helium is helium-3; the atomic number of helium is 2.
What is Atomic number 2?
Atomic number 2 is Helium, which has the symbol He
What is the mass number of helium atom?
The atomic number of helium is 2. Its mass is 4.002602 u ± 0.000002 u
How many valence electrons are in an atom of helium?
helium has 2 electrons as its atomic number is 2
What is the mass of a single atom of helium?
The atomic mass of Helium is 4.002602. The atomic mass is the combined number of protons and neutrons in the atom.
How many electrons does an atom of helium have atomic?
Helium atom has 2 electrons.
When an atom gives off a(an)..... It becomes an atom with an atomic number of two less?
An alpha particle, which is the nucleus of a helium atom.
What does the number 2 and 4003 mean of helium?
Helium has atomic number 2. That means the helium atom has 2 protons and two electrons. The standard atomic weight of helium is 4.002602, or 4.003 rounded to 3 decimal places.
What is the atomic weight of Helium atom?
Helium atom has 2 protons and 2 neutrons (that accounts for its atomic weight). The atomic weight of helium is 4.00260
