The central portion of atom carrying positive charge is called nucleus.its charges increase regularly as we go down the group like {H+1) (He+2)(Li+3) so this positive charge is called atomic number.an atom is neutral and its nuclear charge is called atomic number which must be equal to number of proton and number of electrons. ITs showing symbol is (Z)
Calcium's atomice weight is 40.078 amu (atomic mass units).
The atomic radius of calcium is about 197 picometers (pm).
if u mean the atomic number of a chemical element it is the number of electrons and protons it has the other number is the number of neutrons e.g ununoctium number 118 is the atomic number the other number i think is 7
NH3 is a compound, not an element. It does not have an atomic number. If you mean the number of atoms in the molecule the answer is 4: 1 nitrogen and 3 hydrogen. This is not the same as atomic number.
The atomic number is equal to the number of protons in an atom, which also corresponds to the number of electrons in a neutral atom. This means that the atomic number gives you the total number of electrons in a neutral atom of that element.
It means that 2 is calciums' mass number and atomic number
Calcium's atomice weight is 40.078 amu (atomic mass units).
Calcium is a metal element. Atomic mass of it is 40.
Calcium (Ca) has the atomic number 20, this means it has 20 protons and 20 electrons.
The atomic radius of calcium is about 197 picometers (pm).
The gas, neon, is elemental and thus contains no calcium. Neon contains only neon. Note atomic number 10.
atomic number is 37
Beryllium Atomic number: 4 Atomic Mass: 9.012
The atomic number is the number of protons in the nucleus of the atom.
The meaning of the atomic number is: number of protons and electrons (for californium is 98).
calciums malleability is undifined because nobody actually knows
Atomic number = Number of protons = Number of electrons (in the neutral state) Also the atomic number is number of a chemical element in the periodic table of Mendeleev.