topic 4 chemical bonding and structure

Question 1

chemical bond

Answer 1

an electrostatic force which holds two or more atoms or ions together

Question 2

types of bonds (3)

Answer 2

ionic, covalent, metallic

Question 3

breaking of bonds …
formation of bonds…

Answer 3

requires (absorbs) energy - endothermic process
releases energy - exothermic process

Question 4

ionic bond

Answer 4

(or electrovalent bond) refers to the electrostatic attraction experienced between the electric charges of a cation (positive ion) and an anion(negative ion)positively charged ions (cations) and negatively charged ions (anions)

Question 5

covalent bond

Answer 5

is the electrostatic attraction between a shared pair of electrons and the nuclei of the atoms being bonded

Question 6

valence electrons

Answer 6

electrons in the outermost shells of the atoms

Question 7

ionic molecules with covalent character

Answer 7

Al2O3

Question 8

covalent bond with ionic character +explain

Answer 8

NH3, HCl
uneven distribution of electronegativity
partial charges - hydrogen partially positive