11 electrons
The mass number is given at the top left of the elements symbol, for example, sodium has a mass number of 23. We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.
How many protons neutrons and electrons are in an atom of sodium 23?
An atomic number of 11 means this atom will have 11 protons. A mass number of 23 means 23 – 11 this atom will have 12 neutrons. Since this atom is neutral the positive protons must be equal to the negative electrons. This atom will have 11 electrons.
What is the protons of sodium 23?
11
sodium-23/Protons
Is sodium-23 an isotope?
Sodium-23 is the only naturally occurring isotope of sodium.
Why is the mass number of sodium-23?
Mass number = Total number of protons + Total number of neutrons Sodium atom has 11 protons and 12 neutrons in its nucleus. Thus, we get the atomic mass number 11 + 12 = 23.
How many electrons in an ion of sodium with a mass number of 23?
For sodium, that means there are 11 protons and 11 electrons. Since we know that there are 11 protons, there must be 12 neutrons for the mass number to equal 23 (23-11=12).
What is the structure of a sodium atom?
The nucleus consists of 11 protons (red) and 12 neutrons (blue). 11 electrons (green) bind to the nucleus, with a single, relatively unstable electron in the outer shell (ring). The stability of an element’s outer electrons determines its chemical and physical properties.
How do you write sodium-23?
Sodium-23 atom is the stable isotope of sodium with relative atomic mass 22.989770, 100 atom percent natural abundance and nuclear spin 3/2. A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.
Why is sodium-23 stable?
Sodium-23 is the only stable isotope of sodium. It contains 12 neutrons. 100% of natural sodium is sodium-23. Sodium-24 is a stable isotope containing 11 neutrons.
How is sodium-23 used?
Used alone or in combination with other phosphate compounds, it is given intravenously as an electrolyte replenisher, orally or rectally as a laxative, and orally as a urinary acidifier and for prevention of kidney stones. sodium monofluorophosphate a dental caries preventative applied topically to the teeth.
What is the atomic number of sodium 23?
Sodium is a chemical element with symbol Na and atomic number 11 and atomic mass 23. It is a soft, silvery-white, highly reactive alkali metal. Sodium atoms have 11 electrons, one more than the extremely stable configuration of the noble gas neon.
How many atoms are in sodium?
Sodium hydroxide has the formula NaOH and it contains three atoms, one each of Sodium, Hydrogen and Oxygen.
How many electrons are in a sodium atom?
Sodium has 11 electrons: its atomic number is 11, so it has 11 protons; atoms are neutral, so this means sodium also has 11 electrons. Electrons are arranged in “shells” or energy levels. Depending on your level of Chemistry, it is probably easier to think of them as particles orbiting the nucleus.
What is the basic structure of an atom?
Overview of Atomic Structure. Atoms are made up of particles called protons,neutrons,and electrons,which are responsible for the mass and charge of atoms.
