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Helium with two protons and two neutrons has a atomic number of what?
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∙ 14y ago
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∙ 14y ago
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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.
Heliums atomic number?
The atomic number of helium (He) is 2. The atomic weight of He is 4.002602 grams per mole.
What is the superscript 4 for helium?
4He or He4. 4 stands for the mass number of Helium Mass number = number of protons + number of neutrons Since the atomic number or number of protons in helium is 2, the number of neutrons in He-4 is also 2.
How many protons neutrons and electrons are in helium?
Helium has two protons, since its atomic number is two. It is an inert element so it also has two electrons. The number of neutrons depends entirely on the isotope. The most common and stable isotope of Helium has 2 neutrons.
How many electrons protons and neutrons are found in the helium atom having atomic number 2 and mass number 4?
With the details you've given (which are correct) you can tell that because the atomic number is 2, He therefore has two protons. Because its atomic mass is 4 it therefore also has two neutrons (2 + 2 = 4)
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.
Heliums atomic number?
The atomic number of helium (He) is 2. The atomic weight of He is 4.002602 grams per mole.
What has 2 electrons 2 neutrons and 2 protons?
An atom with 2 protons is naturally Helium. Therefore, this isotope would be called helium - 5 because it has 5 particles in its nucleus, 2 protons and 3 neutrons.
How do you calculate mass number of an atom?
The atomic mass is the number of protons plus the number of neutrons. The number of protons is identical to the atomic number (as well as electrons, but these don't matter right now). So, let's take helium. It has 2 protons and 2 neutrons, therefore the atomic mass # of helium is 4. Helium weighs 4 Atomic Mass Units (AMU).
What are other differences between lithium and helium?
Helium has an atomic mass of 4.- Number of Protons/Electrons: 2- Number of Neutrons: 2Lithium has an atomic mass of 7.- Number of Protons/Electrons: 3- Number of Neutrons: 4Helium has TWO less neutrons than Lithium.
What is the superscript 4 for helium?
4He or He4. 4 stands for the mass number of Helium Mass number = number of protons + number of neutrons Since the atomic number or number of protons in helium is 2, the number of neutrons in He-4 is also 2.
What is the number of protons neutrons and electrons for Helium?
protrons=2 electrons=2 neutrons=2
How did the helium got the mass number 4?
helium has 2 protons and 2 neutrons. so its atomic number is 4
What is the atomic number o an atom that has 2 protons and 3 neutrons?
2 (helium). With 3 neutrons it would be Helium-5 which is the most unstable radioisotope of helium.
How many protons and neutrons electrons in helium?
Helium has two protons, since its atomic number is two. It is an inert element so it also has two electrons. The number of neutrons depends entirely on the isotope. The most common and stable isotope of Helium has 2 neutrons.
How many electrons protons neutrons are in helium?
Helium has two protons, since its atomic number is two. It is an inert element so it also has two electrons. The number of neutrons depends entirely on the isotope. The most common and stable isotope of Helium has 2 neutrons.
How many protons neutrons and electrons are in helium?
Helium has two protons, since its atomic number is two. It is an inert element so it also has two electrons. The number of neutrons depends entirely on the isotope. The most common and stable isotope of Helium has 2 neutrons.
