C2.1 Flashcards
What is the difference between mixing two substances and reacting them?
If you are mixing you can separate them.
If you are reacting it’s hard to get back the original elements.
What is covalent bonding?
Non-metals sharing electrons.
What is ionic bonding?
A non-metal and a metal transferring electrons.
What name do we give to the arrangement of ions in an ionic compound?
Giant structure/lattice.
What holds the ions together in this arrangement?
Electrostatic force of attraction.
What is the overall charge of an ionic compound? Why?
0 because the protons and electrons cancel each other out.
What is the formula of magnesium chloride?
MgO
What is the bond called when two atoms share a pair of electrons?
Covalent
What do we call the structure of a substance held together by a network of covalent bonds?
Giant covalent structure.
Why do metals form crystals?
Atoms in metals are built up layer upon layer in a regular pattern.
Which electrons do metal atoms use to from metallic bonds?
Delocalised electrons.
