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How many protons and neutrons are in the nucleus of a helium-4 atom if it has twice as many protons as a hydrogen atom?
A hydrogen atom has 1 proton in its nucleus. Since the helium-4 atom has twice as many protons as hydrogen, it has 2 protons. Helium-4 also has 2 neutrons, hence the name "4" representing the total number of protons and neutrons.
Which particle or particles make up the nucleus?
Every nucleus (except for Hydrogen) consists of protons and neutrons. The hydrogen nucleus is only a proton.
What is in the core of every atom?
The nucleus of the atom contains the protons and neutrons. The number of protons, called the "atomic number", determines what kind of element this is. There are almost always more neutrons in the nucleus than protons, except for very light elements. For example, hydrogen has one proton and no neutrons, while helium contains two protons and two neutrons.
What element has one proton and two neutrons?
The number of protons defines the element. So if an atom has one proton, you will automatically know it is hydrogen. The number of neutrons or electrons will not change what element it is. Though if the question is asking, hydrogen with two protons is 3H, or tritium.
How many neutrons are in hydrogen peroxide?
Hydrogen peroxide (H₂O₂) consists of two hydrogen atoms and two oxygen atoms. The atomic number of oxygen is 8, meaning each oxygen atom has 8 protons and typically 8 neutrons. This gives us a total of 16 neutrons for both oxygen atoms. Hydrogen does not have any neutrons. So, hydrogen peroxide has a total of 16 neutrons.
How is the nucleus of the hydrogen atom different from the nucleus of the helium atoms?
The hydrogen nucleus has a single proton. The helium nucleus has two protons and one or two neutrons.
Are hydrogen-3 and helium-3 isotopes of the same element?
No. hydrogen-3 (tritium) has a nucleus with one proton and two neutrons, and is unstable. Helium-3 has a nucleus with two protons and one neutron, and is stable.
How many neutrons does the neutral atom have?
It varies depending on the atom but basically there are the same number of neutrons as there are protons. Helium has two protons, two electrons, and two neutrons. The difference between the atomic mass and the atomic number equals the atom's number of neutrons. Consider hydrogen, for example. Standard hydrogen has no neutrons, just one proton. Deuterium is an isotope of hydrogen with one neutron, and tritium (which is unstable) has two neutrons. Carbon 12 has six protons and six neutrons, but carbon 14 (which is unstable) has six protons and eight neutrons. As you move up the periodic table, nuclei tend to have more neutrons than protons. 92 U 238, for example, has 146 neutrons.
Does hydrogen or helium have the least atomic mass?
Hydrogen has the lowest atomic mass of all the elements. Hydrogen has one proton and one electron. Helium, two neutrons, two protons and two electrons.
What are the correct parts of an atom?
There are three parts to an atom. The nucleus consists of a proton or a combination protons and neutrons. The number of protons is the atomic number, and determines the element. For example, hydrogen has one proton. Helium has two protons and two neutrons. Varying numbers of neutrons represent different isotopes of that element. Deuterium is hydrogen with an additional neutron. The number of protons is generally matched by the number of electrons. If there is an imbalance, an ion (charged element or molecule) is the result. Electrons have a tiny fraction of the mass of either protons or neutrons.
Protons neutrons and electrons of hydrogen?
1 proton, 0 neutrons, 1 electron
Why is it impossible for the atomic number of element to be greater than its mass number?
The atomic number of an element is the number of protons in the nucleus of that element (and in any isotope of that element). The mass number of an element is the number of protons plus the number of neutrons in the nucleus of that element (and that number will differ for each isotope of that element). In any given element (save hydrogen) there are always one or more neutrons in the nucleus. As the atomic number is just the number of protons, it will always be less than the number of protons plus the number of neutrons. Always. The "outcast" is hydrogen. Most hydrogen has just a single proton in the nucleus. That means for those atoms of hydrogen, the atomic number (number of protons) and the mass number (number of protons plus the number of neutrons) will be one. (Recall that there are no neutrons in "regular" hydrogen.) Hydrogen does have two other isotopes. One has one neutron and the other has two neutrons. The atomic number for each of those two isotopes is still one, but their mass numbers will be two and three, respectively.
