C2 1 Structure and bonding

HideShow resource information
  • Created by: jkav
  • Created on: 18-04-14 11:24
What is a compound?
A substance made of two or more elements that have reacted together or that are chemically bonded together
1 of 9
Which electrons in an atom are involved in bonding?
Outer electrons (electrons in the highest occupied energy level or outer shell)
2 of 9
What happens to the electrons in atoms when ionic bonds are formed?
They are transferred or metal atoms lose electrons and non - metal atoms gain electrons.
3 of 9
What happens to electrons in atoms when covalent bonds are formed?
They are shared. For each covalent bond one pair of electrons is shared.
4 of 9
Why do the elements in Group 1 form ions with a single positive charge?
They lose thier one outer shell electron (one electron in the highest occupied energy level or outer shell)
5 of 9
Why do the elements in Group 7 form ions with a single negative charge?
They gain one electron so their outer shell has eight electrons or so they have the structure of a noble gas
6 of 9
Why do ionic compounds have giant structures?
The attractive forces between oppositely charges ions act all directions, so the ions pack closely together in a regular arrangement (lattice), ions are very small so a crystal contains many ions.
7 of 9
Explain why silicon (in Group 4) has a giant structure
Silicon atom form four covalent bonds, each silicon atom can join to four others, the bonds are strong; this continues so that a giant structure is formed.
8 of 9
Explain how the atoms in a piece of sodium metal are held together
The outer electrons delocalise, leaving a lattice of positive ions; the delocalise electrons attract the positive ions; the electrostatic forces are strong, and these hold the ions in position
9 of 9

Other cards in this set

Card 2

Front

Which electrons in an atom are involved in bonding?

Back

Outer electrons (electrons in the highest occupied energy level or outer shell)

Card 3

Front

What happens to the electrons in atoms when ionic bonds are formed?

Back

Preview of the front of card 3

Card 4

Front

What happens to electrons in atoms when covalent bonds are formed?

Back

Preview of the front of card 4

Card 5

Front

Why do the elements in Group 1 form ions with a single positive charge?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Structure and bonding resources »