grade 10 SCIENCE!!!?

Question

a) what kind of atoms form molecular compounds?
b) how do the atoms in molecular compounds form stable electron arrangements?
c) what type of bond holds atoms together in molecules?

Answer 1

1. Elements. Any element - alkalis, gases, metal ions etc.
2. They bond in some form. Bonding is the sharing or donating of electrons between elements.
3. There are 4 bonds that occur between molecules. Covalent bonds are the strongest and it is where molecules share valence electrons. Ionic bonding is when an atom gives up one or more electron to another element to fill their valence shells. Next on the strength list is Hydrogen bonding which is the dipole attraction between a partial positive charge on a bonded hydrogen atom and a partial negative charge on an oxygen, nitrogen, or sulfer molecule. The weakest interaction is Van der Waals interactions which result from instantaneous charge density changes in an electron cloud and are very weak.

Answer 2

a. non-metals form molecular compounds
b. they share one or more pairs of electrons
c. that sharing of electrons between two atoms is a covalent bond.

Answer 3

a. elements
b. ?
c. chemical bond