Name: Aluminum Symbol: Al Atomic Number: 13 Atomic Mass: 26.981539 amu Melting Point: 660.37 °C (933.52 K, 1220.666 °F) Boiling Point: 2467.0 °C (2740.15 K, 4472.6 °F) Number of Protons/Electrons: 13 Number of Neutrons: 14 Classification: Other Metals Crystal Structure: Cubic Density @ 293 K: 2.702 g/cm 3 Color: Silver British Spelling. Although aluminum is the most abundant metal in the earth's crust, it is never found free in nature.All of the earth's aluminum has combined with other elements to form compounds. Two of the most common compounds are alum, such as potassium aluminum sulfate (KAl(SO 4) 2 12H 2 O), and aluminum oxide (Al 2 O 3).About 8.2% of the earth's crust is composed of aluminum. The aluminum atom has an electronic configuration of 1s 2 2s 2 2p 6 3s 2 3p 1 and has a valence of +3 in all compounds with the exception of a few high-temperature monovalent and divalent gaseous species. High-purity aluminum is resistant to attack by most acids.
Atoms are the building blocks of matter.
Each atom of an element is neutral. Being neutral means there is no net charge.
Aluminum Atomic Radius
Atoms have equal numbers of protons and electrons. The positively charged protons are found in the nuclei of atoms, and the negatively charged electrons are outside the nuclei.
An atom’s atomic number equal to the atom’s number of protons and electrons
Aluminum’s atomic number is 13, thus each aluminum atom has 13 +(protons) and 13- (electrons).
The diagram shows the 13 electrons outside and at different distances from the nucleus. The red circle represent the nucleus and the black circles represent the energy levels away from the nucleus.
How to make models of atoms can be found in “Janice VanCleave’s books of “Super Science Models.”
Aluminum Atomic Symbol