Bonding And Structure Flashcards
Explain why solid sodium oxide does not conduct electricity
As ions not free to move and sodium oxide has giant ionic lattic
Explain why calcium nitrate has a high melting point refer to Structure and bonding in your answer
It has a giant ionic structure and strong electrostatic attraction force between opposite charged ions
What ìs meant by ionic bond?
Type of bond that is formed from electrostatic attraction force between positive ions of metal and negative ion of non metals atoms
Ionic compounds made up of _____
Covalent compound made up of ___
Ions
Molecules
Why ionic compound solid at room temperature??
Because ions are attracted together by strong ionic bond between oppositely charged ions
Why ionic compounds have h.m.p and h.b.p
Because ions are bonded by strong ionic bonds between oppostely charged ions that need high energy to overcome.
Why solid crystal don’t conduct electricity?in molten or aqueous
Because in solid ions are not free to move on molten or aqueous
Why magnesium oxide has much higher melting point and boiling point than those of sodium chloride??
Because ions have double charges and double attraction force between opposite charged ions compare to those on sodiumchloride ions that need more energy to break bond
What is meant by covalent bond?
Type of bond that is formed from the strong electrostatic attraction force between negatively charged pair of electrons and two positive nuclei of atoms
Examples of sime covalent structure
Iodine crystals (solid crystal)
Solid carbon dioxide (dry ice)
Buckminster fullerene
Why simple covalent molecules are mainly gases at room temperature??
As molecules bonded by weak intermolecular force
Why sime covalent molecules have low melting point and boiling poiny
Because molecules bonded by weak intermolecular force that need little energy to overcome
Why simple covalent molecules don’t conduct electricity or heat???
Because substance consist of neutral molecules (no free moving ions or electeons)
