Lithium, atom no. 3
A bunch of them can have 74 neutrons, this is because there are isotopes in the world.
Any element can have 4 neutrons but most of them aren't metallic. Anyway's on the periodic table it would be Be and that stands for Beryllium
Helium is number 2 on the Periodic Table, and the number of its mass is 4. So, therefore it has 2 protons, 2 neutrons, and 2 electrons !
Copper is located in period 4 of the periodic table.
Atomic number : 4
Helium is number 2 on the Periodic Table, and the number of its mass is 4. So, therefore it has 2 protons, 2 neutrons, and 2 electrons !
Titanium is in row 4 and column 4 of the periodic table and is a transition metal.
The element with mass number 40 and 21 neutrons is Calcium (Ca), which belongs to Group 2 and Period 4 of the periodic table. It has 20 protons (40 - 21 = 20) in its nucleus, making it the 20th element in the periodic table.
group four in the periodic table is a carbon group
Helium is number 2 on the Periodic Table, and the number of its mass is 4. So, therefore it has 2 protons, 2 neutrons, and 2 electrons !
The ISBN of The Periodic Table - book - is 0-8052-3929-4.
Arsenic is in row 4 on the periodic table. It is located in Group 15 (VA) and Period 4.