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An atom contains equal numbers of protons and electrons . Since protons and electrons have equal and opposite charges , this means that atoms are neutral overall.
Do atoms have the same number of protons and neutrons?
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.
Why do atoms always have the same number of protons and electrons?
Answer: An electron is a negatively charged particle and a proton is a positively charged particle. As negative charged attracts the positive charged and vice versa, both electron and proton stays together so that overall charge is zero / neutral. Thus an atom always has equal electrons and protons to remain neutral.
Do all atoms 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.
Can an atom have no electrons?
Hydrogen forms the only cation that has no electrons, but even cations that (unlike hydrogen) still retain one or more electrons are still smaller than the neutral atoms or molecules from which they are derived.
Can an atom have unequal number of electrons and protons?
If an atom has unequal numbers of protons and electrons, it will be charged and is called an ion. The reaction below shows how ions form. The tendency is to gain or lose electrons until the number of electrons remaining equals that of the nearest noble gas.
Do electrons always equal protons?
Heavier atoms tend to have more neutrons than protons, but the number of electrons in an atom is always equal to the number of protons. So an atom as a whole is electrically neutral. When one or more electrons is stripped away from an atom, it becomes positively charged.
Does all atoms of the same element have the same number of electrons?
Atoms of the same element have the same atomic number so the number of protons (and electrons) are same. But they have same or different mass numbers (like that for isotopes). Different mass number will have different number of neutrons.
Does every atom have electrons?
Every atom is composed of a nucleus and one or more electrons bound to the nucleus. The nucleus is made of one or more protons and a number of neutrons. Only the most common variety of hydrogen has no neutrons. More than 99.94% of an atom's mass is in the nucleus.
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.
