Do all atoms have the same number of protons and electrons?
Atoms always have an equal number of protons and electrons, and the number of protons and neutrons is usually the same as well. Adding a proton to an atom makes a new element, while adding a neutron makes an isotope, or heavier version, of that atom.
How many protons neutrons and electrons are in the universe?
Therefore the observable universe is defined as only the parts of the universe that are within 13.7 billion light years of us. The commonly accepted answer for the number of particles in the observable universe is 1080. This number would include the total of the number of protons, neutrons, neutrinos and electrons.
Why do atoms have equal number of protons and electrons?
Actually the proton and electron count of an atom are equal only when the atom is neutral in charge. The electrons are found in orbitals surrounding the nucleus. In order for the atom to remain electrically neutral the protons and electrons must balance each other.
Why don t all atoms have the same number of protons?
Explanation: Atoms from two different elements may have the same number of neutrons, but never the same number of protons. The number of protons is unique to the element and represents the atomic number.
What is 98\% of the universe made of?
The lightest two, hydrogen and helium, make up 98 percent of what we see in the universe. They have an unfair advantage in that they’ve been around since shortly after the Big Bang. Most of the other elements had to wait for giant nuclear reactors known as stars to churn them out.
How many protons are in the universe?
In astrophysics, the Eddington number, NEdd, is the number of protons in the observable universe. Eddington originally calculated it as about 1.57×1079; current estimates make it approximately 1080.
Do atoms always have the same number of protons?
All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms. For example, all helium atoms have two protons, and no other elements have atoms with two protons.
Why do you think the 8 represents the number of protons and not the number of electrons or neutrons?
The number eight also means that oxygen has eight protons in the nucleus. The number of protons and the number of electrons are always the same in an element that is neutral and has no charge. Therefore oxygen has 8 electrons. You will find that the atomic weight of oxygen is about 16.
Are all protons the same?
All protons are identical. For example, hydrogen protons are exactly the same as protons of helium and all other elements, or pure substances. However, atoms of different elements have different numbers of protons. The number of protons in an atom determines the electrical charge of the nucleus.
Why don t all atoms have the same mass?
REMEMBER: Atoms of the same chemical element do not always have the same mass because, although the number of protons in the nucleus is the same for all atoms of the same element, the number of neutrons is not. Most elements as they occur naturally on earth are mixtures of several isotopes.
What element makes up about 90\% of the known universe?
The chemical composition of the Universe is dominated by the hydrogen and helium produced in the Big Bang. The remaining 90 or so chemical elements are produced in stars and constitute only a few percent of the overall mass….
| Chemical composition of the Sun | |
|---|---|
| Oxygen | 0.80\% |
| Carbon | 0.36\% |
| Iron | 0.16\% |
| Neon | 0.12\% |
Does the universe have more protons or electrons?
In a Universe loaded with neutrons and protons, it seems like building elements would be a cinch…. As the Universe cools, more neutrons turn into protons than the other way around. By time all is said and done, the Universe is 85-86\% protons (with an equal number of electrons) and just 14-15\% neutrons.
What is equal to the total number of protons and neutrons?
Protons and electrons are just two of the three subatomic particles that make up an atom. The third is the neutron, and this particle is the odd one out in terms of number. While protons and electrons will number equal to an element’s atomic number, an atom ‘s total number of neutrons is equal to the rounded atomic mass minus the atomic number.
Are the number of protons and neutrons always the same?
Protons and neutrons have approximately the same mass. However, one proton weighs more than 1,800 electrons. Atoms always have an equal number of protons and electrons, and the number of protons and neutrons is usually the same as well.
Are the same number of protons as electrons in an atom?
For a neutral atom, the number of electrons is the same as the number of protons. Often, the number of protons and electrons is not the same , so the atom carries a net positive or negative charge. You can determine the number of electrons in an ion if you know its charge.
How do you calculate the number of protons and neutrons?
The number of neutrons can be calculated by subtracting the number of protons from the atomic mass, which is 16 minus eight for oxygen.An atom is primarily comprised of neutrons, electrons and protons. The neutrons and protons are contained within the nucleus, a tight central area of the atom.