Their outermost electrons are in the same shell. For example, Helium and Hydrogen have 1 and 2 electrons respectively, and these electrons exist within the first electron shell. Lithium has 3 electrons and the third of these electrons is in the second electron shell, and so, it is a member of the 2nd period of the Periodic Table.
They have the same number of valence electrons in their outermost shell.
The same shell
Atoms of nonmetals tend to be smaller than atoms of metals in the same period.
All member of the same period share the same number of energy levels. The energy levels range from one up to seven.
The period number is the same as the highest energy level containing electrons for the atoms in that period.
There are 17 elements larger than calcium (Ca) on the periodic table in calcium's period.
Elements in group 1 have a lower number of electrons with respect to the other elements in the same period.
Atoms of nonmetals tend to be smaller than atoms of metals in the same period.
They all have the same number of energy levels. That's about it.
All member of the same period share the same number of energy levels. The energy levels range from one up to seven.
bromine, i think
The period number is the same as the highest energy level containing electrons for the atoms in that period.
There are 17 elements larger than calcium (Ca) on the periodic table in calcium's period.
From left to right in a period the size of the atoms decreases.
bromine, i think
All atoms of a given element have the same number of protons in a nucleus. It is the number of protons in an atom's nucleus that determines the elemental identity of any atom. Period.
Assuming you are talking about a period made by carbon atoms (Pencil lead is almost pure carbon) and that period has a mass of 0.0001g Then the answer is 5x1018 atoms.There are 12.011g of carbon per mol, there are 6.022x1023 atoms per mol.1mol | 6.022x1023 atoms | 0.001 g |-----------|--------------------------|-------------| = 5x1018 atoms/period12.011g | 1 mol | period |
The atom of an element in the third period of the Periodic Table has 3 energy levels and so on. Also, atoms of elements in the same group have the same no. of valence electrons.
Atoms of the same Element have this.