Structure and bonding Flashcards
(23 cards)
What is the difference between ions and atoms?
Ions have a charge (ionized) and an atom is an Ions that does not have a charge, for example:
atom = Na
Ions = Na2+
What is a metallic bond?
A metallic bond is a structure inside metals mad of delocalised and free - moving electrons these are positively charged.
What is a covalent bond?
A covalent bond is a bond between non - metal atoms where they share their electrons to both get a full outer shell.
What is an ionic bond?
An ionic bond is between non metal and metal atoms where their electrons are transferred
Ionic compounds have _____ electrostatic forces of attraction in all directions between _______ charged ions.
Ionic compounds have STRONG electrostatic forces of attraction in all directions between POSITIVELY charged ions.
Do ionic bonds have a high or low melting and boiling point? Why?
Ionic bonds have high melting and boiling points because they need lots of energy to break the many strong bonds.
When ionic bonds are melted or dissolved do they conduct electricity?
Yes they can because the ions are free to move.
Metals have strong ______ bonding and have ______ melting points and boiling points.
Metals have strong METALLIC bonding and have HIGH melting points and boiling points.
Can the layers of ions in metals easily slide over each other? This means that?
The layers of ions in metals CAN easily slide over each other this means that they can be bent and shaped.
What is Ghraphene?
Graphene is a single layer of graphite.
Where are the neutron’s and proton’s found?
They are found in the nucleus of the atom.
A positive charge ________ an electron and a negative charge ______ an electron.
A positive charge loses an electron and a negative charge gains an electron.
Can solids be compressed?
No there is no room for the particles to move and compress.
Call liquids be compressed?
No they cannot because they too do not have room for the particles to compress.
Can gases be compressed?
Yes they can as the particles (atoms) are freemoving and can be compressed together, for example some deodorant cans are compressed to save shipping weight.
Sharing electrons is called?
Covalent bonding
Transferring electrons is called?
Ionic bonding
When atoms bond together by sharing electrons, what kind of bond is formed?
Covalent.
Group 1 atoms form _____
1+ ions
Group 2 atoms form _____
2+ ions
Group 3 ions form _____
3+ ions
Group 4 ions form _____
Group 4 ions do not form ions apart from tin Sn and Pb at the bottom of the group.
Group 5 ions form ______
Group 6 ions form ______
Group 7 ions form ______
G5) 3- ions
G6) 2- ions
G7) 1- ions
