SpletOxygen is a chemical element with atomic number 8 which means there are 8 protons in its nucleus. Total number of protons in the nucleus is called the atomic number of the atom … Splet17. nov. 2024 · The mass of an element is the sum of the atomic number and the number of protons. What is atomic mass? Atomic mass is the total weight of all the particles …
Chemical element - Wikipedia
Splet26. maj 2024 · Advertisement. arianasofia14. An element's mass number (A) is the sum of the number of protons and the number of neutrons. The small contribution of mass from electrons is disregarded in calculating the mass number. Together, the number of protons and the number of neutrons determine an element's mass number: mass number = … SpletThe atoms of different elements have different numbers of protons. For example, all oxygen atoms have 8 protons and all sodium atoms have 11 protons. The mass number of an … guinea pig bloated stomach
An element has 5 protons, 6 neutrons, and 5 electrons. What is the mass …
SpletThe mass number of an atom is equal to the sum of protons and neutrons in the nucleus.A helium atom has 2 protons and 2 neutrons. What is the mass number of this atom? 42. … Splet09. jul. 2024 · The numerator in the above formula gives the average atomic mass, which has a unit of the dalton or the unified atomic mass (u). In order to make the result dimensionless we divide it by 1 u. 1 u is also defined as the one-twelfth atomic mass of carbon-12, 1 u = 1 ∕ 12 m(12C). Splet16. dec. 2016 · answered The mass number of an element is equal to a) the total number of electrons B) the sum of the protons and neutrons C) less than twice the atomic number D) a constant number for the lighter elements See answer Advertisement delmars B. The sum of the protons and neutrons. You're welcome. thank you Advertisement Advertisement guinea pig behaviour