Across a period from left to right, the covalent radius decreases. As you move from left to right across the periodic table, atoms have more electrons in their outer energy level and more protons ...

"Traditional understanding of the periodic table suggests that berkelium would ... rather than the stronger glue of covalent ...

Students look more deeply into the structure of the atom and play a game to better understand the relationship between protons, neutrons, electrons, and energy levels in atoms and their location in ...

For example, a question about fertilisers could include ideas about covalent substances ... Two elements in group 1 of the periodic table are lithium and sodium. Very small pieces of lithium ...