Table of Contents
What is the atomic number and the mass number of an atom with 11 protons and 12 neutrons?
Sodium
Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.
What is the atomic number of sodium 11?
Fact box
| Group | 1 | 97.794°C, 208.029°F, 370.944 K |
|---|---|---|
| Block | s | 0.97 |
| Atomic number | 11 | 22.990 |
| State at 20°C | Solid | 23Na |
| Electron configuration | [Ne] 3s1 | 7440-23-5 |
Which symbol has an atomic number of 11?
Na Sodium
The Elements, sorted by Atomic Number
| Atomic Number | Symbol | Name |
|---|---|---|
| 10 | Ne | Neon |
| 11 | Na | Sodium |
| 12 | Mg | Magnesium |
| 13 | Al | Aluminum |
What element has a mass number of 11?
boron-11
In your case, the name boron-11 is used to designate an isotope of boron that has a mass number equal to 11 . As you know, the identity of an element is given exclusively by the number of protons it has in its nucleus.
How many electrons are there in the third shell of sodium Na atomic number 11?
one electron
There is only one electron in the third shell of a neutral sodium atom.
What is the 11th atom?
Sodium is the element that is atomic number 11 on the periodic table. It is located in the alkali metals group on the far left side of the periodic table.
What does the number 11 mean in Boron-11?
Explanation: Isotopes are given by the name of the element and the mass number. Here boron-11 means the name of the element is boron and the mass number is 11. For boron-11 this total is 11, and five of the particles are protons, thus 11−5=6 neutrons.
What is atomic mass unit class 11?
One atomic mass unit is defined as a mass exactly equal to one – twelfth the mass of one carbon -12 atom. It is used to express the mass of atomic and subatomic particles. Because the atomic mass of an atom is actually very-very small because atoms are extremely small.