C3b How Atoms Combine Question Foundation

C3b How Atoms Combine Question foundation paper

HideShow resource information
  • Created by: Amira
  • Created on: 03-05-12 07:21
Preview of C3b How Atoms Combine Question Foundation

First 336 words of the document:

Item C3b: How Atoms Combine ­ Ionic Bonding
1. Atoms are neutral because they contain the ................ number of protons and electrons.
Atoms can lose or gain ................ from its shells. ( they cannot lose protons that easily,
you'll never asked about protons so you only need to learn about electrons lost or gained). If an
atom of group of atoms lose or gain electrons it becomes c................ . When an atom or group
of atoms become charged their known as ................ .
2. If an atom loses electrons it becomes ................ , losing one electron makes it an ion with
charge ................ losing two electrons make it an ion with charge ................ .
3. If an atom gains electrons then it becomes ................ . Gaining one electron makes it 1
gaining two electrons makes it an ion with charge ................ .
4. Metals and nonmetals react to produce a type of compounds called ................ compounds.
The ................ transfers one or more ................ to the nonmetal. The metal becomes
................ ( as it loses electrons) and the nonmetal becomes ................ ( as it gains
electrons). Now as they have opposite charges and they ................ each other. This attraction
Is known as the ................ bonding.
5. For example, sodium (which is a metal) transfers one electron to chlorine atom. Sodium
becomes ................ and chlorine becomes ................ opposite charges attract each other
and they become the compound: s................ c................ .
6. M................ are made up of more than one atom. ( they can be the same type of atom). From
the following circle all the molecules:
H2O Ag H2 Cu CH4 N2 O2 CuO Na2O Fe
S
HCl FeS
7. Sodium chloride:
has a ................ melting point
d................ in water
when ................ it does not conduct electricity. When ................ it will conduct
electricity.
8. Magnesium oxide:
has a very ................ melting point
when ................ does not conduct electricity.
9. Sodium chloride ................ ( when dissolved in water) conducts electricity. ( Magnesium oxide
does not dissolve in water)
10. Magnesium oxide and sodium chloride conduct electricity when m................ .

Comments

No comments have yet been made

Similar Science resources:

See all Science resources »See all resources »