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Within a family or group of periodic table the atomic mass increases from top to bottom.
A gram atomic mass of helium (He) contains the same number of atoms as 1 mole of helium. Since 1 mole of any substance contains approximately 6.022 x 10^23 atoms, a sample of helium with a gram atomic mass would contain that same number of atoms.
Atomic number is the number of protons in an atom, not the number of atoms. The element with the atomic number 15 is phosphorus.
Yes, all carbon atoms have the same atomic number, and that is 6.
Atomic Mass
15.999
The atomic radius increase down in a group; the cause is the lower attraction from the nucleus atoms with increased bigger atomic mass.
Within a family or group of periodic table the atomic mass increases from top to bottom.
If the atoms are the same, it is the atomic radius.
A gram atomic mass of helium (He) contains the same number of atoms as 1 mole of helium. Since 1 mole of any substance contains approximately 6.022 x 10^23 atoms, a sample of helium with a gram atomic mass would contain that same number of atoms.
Atomic means to do with atoms
Atomic number is the number of protons in an atom, not the number of atoms. The element with the atomic number 15 is phosphorus.
Atoms.
how do you find the atomic number for an element?
atomic number
Atoms of the same Element have this.
Atomic Mass minus atomic number