Science Week 3

Question 1

Ionic Compounds

Answer 1

• made up of positive ions/negative ions in a specific ratio
• electrons lost must equal the electrons gained
• molecule must be neutral and stable
• electrostatic charge keeps the ions together

Question 2

Polyatomic Ion

Answer 2

• group of atoms that act like a single entity
  E.G:-
  Hydroxide OH^-1
  Ammonium NH4^+1

Question 3

Naming Ionic Compounds

Answer 3

Positive Ion Name (Roman Numeral for those with multiple valency)—>

1. Negative Ion name —> polyatomic ions
2. Non-metal —> modified to end with -ide

IDE ——> original element (sulfur)
ATE/ITE ——> modified element (sulfate, sulfite)

Question 4

Covalent Bonding

Answer 4

• only occurs between non-metals

- electrons stay attached to their own nucleus but also occupies the space in the orbital of another nucleus

Question 5

Naming of Covalent Compounds

Answer 5

(prefix) non-metal 1 (prefix) non-metal 2

mon
di
tri
tetra
penta
hexa
hepta
octa
non
dec