Grade 12 IEB Physical Sciences -
Chemical Bonding
Octet Rule - (ANSWER)Atoms gain or lose electrons to get a full outermost energy level of 8
(except for Helium)
Metals - (ANSWER)They normally lose electrons during chemical reactions. Usually, form
positive ions.
Non-metals - (ANSWER)They normally gain electrons during chemical reactions. Usually form
negative ions.
Ion - (ANSWER)An atom that has an electrical charge.
Anion - (ANSWER)An ion with a negative charge. Formed by gaining electrons
Cation - (ANSWER)An ion with a positive charge. Formed by losing electrons.
Chemical bonding - (ANSWER)The force that holds atoms together.
Ionic bond - (ANSWER)a chemical bond between oppositely charged ions - metal bonded to non
metal
Electron dot diagram (aka Lewis structures) - (ANSWER)A shorthand representation of the
valence electrons in an atom.
How to write the formula for an ionic compound: - (ANSWER)write the symbol for your metal
first, then your nonmetal second then kriss kross the signs
Chemical Bonding
Octet Rule - (ANSWER)Atoms gain or lose electrons to get a full outermost energy level of 8
(except for Helium)
Metals - (ANSWER)They normally lose electrons during chemical reactions. Usually, form
positive ions.
Non-metals - (ANSWER)They normally gain electrons during chemical reactions. Usually form
negative ions.
Ion - (ANSWER)An atom that has an electrical charge.
Anion - (ANSWER)An ion with a negative charge. Formed by gaining electrons
Cation - (ANSWER)An ion with a positive charge. Formed by losing electrons.
Chemical bonding - (ANSWER)The force that holds atoms together.
Ionic bond - (ANSWER)a chemical bond between oppositely charged ions - metal bonded to non
metal
Electron dot diagram (aka Lewis structures) - (ANSWER)A shorthand representation of the
valence electrons in an atom.
How to write the formula for an ionic compound: - (ANSWER)write the symbol for your metal
first, then your nonmetal second then kriss kross the signs
