12
A neutral aluminum atom has 13 electrons. However, an aluminum ion has a greater or fewer number of electrons, and is therefore positively or negatively charged.
Aluminium has 13 protons in all isotopes.
2000.69854 electrons in the atom aluminum
Aluminum is a transition state metal.
The coordination number is simply the number of nearest neighbours of an atom/ion. Look at or draw a cube, you will see it has 6 faces or sides. If the neighbours are arranged like a cube around the central atom/ion, there are 6 nearest neighbours just as there are 6 faces: 4 around the body of the cube, 1 above and 1 below.
No, the atomic number refers to the number of protons in an atom. There are 13 protons in an aluminum atom, hence the atomic number is 13.
Coordination number refers to the number of ligands that surround a given atom in a crystal, such as a metal ion center.
A neutral atom of aluminum has 13 electrons, the same as the number of protons, which is its atomic number.
Aluminum has 3 valence electrons.
Be is smaller than Mg. The "coordination number" depends on the relative sizes of the central atom and the ones that are linked (chemists call them ligands) as to how many you can get. For the a give ligand the bigger the Central atom or ion the greater the number you can get round it.
This aluminum atom will have 13 electrons when it is neutral. Recall, however, that aluminum wants to loan out electrons in chemical bonds, and the bonded atoms of aluminum can have 10, 11 or 12 electrons, depending on the bond.
A neutral aluminum atom has 13 electrons. However, an aluminum ion has a greater or fewer number of electrons, and is therefore positively or negatively charged.
According to Wikipedia: "In diamond each carbon atom is at the centre of a tetrahedron formed by four other carbon atoms, so the coordination number is four..."
There are 13 protons in an atom of aluminum, regardless of the isotope. If it didn't have 13 protons, it wouldn't be aluminum, it would be something else. There are 14 neutrons in an atom of aluminum 27, its only stable isotope.See the Related Questions for how to count the number of protons, neutrons and electrons in any atom of any element.
An Aluminum atom is 26.9815 AMU on *average*.
What Does Aluminum atom look like
Aluminum is 13 because that is the atomic number (the number of protons). The atomic mass number is the number of protons and neutrons in an atom. In this, you just subtract the number of protons from the mass number. If Aluminum (Al), #13, has a mass number of 27, then it has 14 neutrons. Pretty simple.