Z
NameAbbreviationAtomic Number (number of protons = number of electrons)Number of neutrons in various isotopesAtomic massValenceGroup
Elements on the periodic table are usually identified by their atomic number, atomic symbol, and atomic weight. The atomic number represents the number of protons in the nucleus, the atomic symbol is a one- or two-letter abbreviation for the element, and the atomic weight represents the average mass of the element's atoms.
The 220 is the atomic MASS, which is the number of protons plus the number of neutrons. 88 is the atomic NUMBER, which is the number of protons only. The "Ra' is the abbreviation for radium, one of the first-detected radioactive elements.
The abbreviation for atomic mass unit is amu, which stands for atomic mass unit. It is a unit of mass used to express atomic and molecular weights.
Arsenic has an atomic mass of 74.9216 rounded to 74.922. It's chemical symbol is-As-and it's atomic number is 33.
Seaborgium. The Atomic Number is 106.
There are multiple numbers on the periodic table. The ones right under the abbreviations is the atomic weight of the atom. The number just above the abbreviation is the atomic number. Here is an example: Sodium 11= Atomic Number Na= Atom Abbreviation 22.99= Atomic weight
The abbreviation for argon is Ar. The name argon comes from the Greek word argos. It's atomic number is 18 and its atomic weight is 39.948
Ni is the abbreviation of the element Nickel. It has the atomic number of 28.
The chemical symbol for phosphorus is P. It is a non-metal with atomic number 15.
An elements symbol is an abbreviation of a chemical element, which makes it easier to read the Periodic Table if you know your abbreviations for each element as it won't be so cluttered. The atomic number is the number of protons found in the nucleus of an atom. In an atom of balanced/neutral charge, the Atomic Number is the number of electrons.
NameAbbreviationAtomic Number (number of protons = number of electrons)Number of neutrons in various isotopesAtomic massValenceGroup
Elements on the periodic table are usually identified by their atomic number, atomic symbol, and atomic weight. The atomic number represents the number of protons in the nucleus, the atomic symbol is a one- or two-letter abbreviation for the element, and the atomic weight represents the average mass of the element's atoms.
The 220 is the atomic MASS, which is the number of protons plus the number of neutrons. 88 is the atomic NUMBER, which is the number of protons only. The "Ra' is the abbreviation for radium, one of the first-detected radioactive elements.
There is no element with the abbreviation "Hz". There's He (helium) with Z = 2, Ho (holmium) with Z = 67, Hf (hafnium) with Z = 72, and Hs (hassium) with Z = 108.Hz is the abbreviation for "hertz" in physics, but that's not a chemical element.
Amu
amu