Covalent bonds - SC6 Flashcards
what are covalent bonds?
strong bonds that hold together molecular substances containing groups of atoms
how can the number of atoms of each element bonded together in a molecule be shown?
by its molecular formula
what are covalent bonds formed between? how are they produced?
non-metal atoms - by sharing pairs of electrons
what happens when the covalent bond of the atoms is formed?
they become more stable - the shared electrons form their outer shell
what do dot-and-cross diagrams show? how does this differ for covalent bonds
The number of electrons in outer shells
The shells overlap with an electron shared between them to form complete outer shells
what is the valency of the element?
the number of covalant bonds formed by atoms of different elements
