La has atomic number 57.Ac has atomic number 89.They both are first elements of lanthanoids and actinoids group respectively.
La - Lanthanum Ac - Actinium
Sc,Y,La,Ac
Actinoids family contain: Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lw.
Actinium, with the chemical symbol Ac, is the chemical element with the atomic number 89.
Source modulation is employed to distinguish between atomic absorption (an ac signal) and flame emission (a dc signal).
Actinium
The first element in the actinide series is actinium , a chemical element in the periodic table that has the symbol Ac and atomic number 89.The actinide (or actinoid) series encompasses the 15 chemical elements that lie between actinium and lawrencium on the periodic table , with atomic numbers 89-103.The actinides get their name from the first element in the series , actinium.
La - Lanthanum Ac - Actinium
Actinium (Ac) Atomic Number: 89 Atomic Weight: 227 Protons: 89 Electrons: 89 Neutrons: 138 -----(227-89=138)
Actinium (Ac) Atomic Number: 89 Atomic Weight: 227 Protons: 89 Electrons: 89 Neutrons: 138 -----(227-89=138)
The elements are called Actinides. They are placed at the bottom of periodic table. These elements have different properties.These elements are in the f group of the periodic table. Elements from Ac-Lr belong to this group. These are called Actinides.
curium belongs to the actinide series on the periodic table. The actinides are a group of elements in the seventh period of the periodic table, and they follow actinium (Ac) and precede lawrencium (Lr). The actinide series includes elements with atomic numbers from 89 to 103. Curium has the atomic number 96 and is represented by the symbol Cm.
I personally don't think there is an Ae on the periodic table. There is Am and an At though. The following are the elements on the periodic table with abbreviations beginning with an A: Al - Aluminium Ar - Argon As - Arsenic Ag - Silver Au - Gold At - Astatine Ac - Actinium Am - Americium
These elements are Cs, Rb, K, La, Ac, Po, Tl.
Sc,Y,La,Ac
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
Actinoids group belongs to elements with atomic number vary from 89 to 103.It encompasses 15 metallic chemical elements.Elements are Ac,Th,Pa,U,Np,Pu,Am,Cm,Bk,Cf,Es,Fm,Md,No and Lr.