Hi everyone i am new to salesforce i had some requirement please tell me 

Create a page which displays a subset of Opportunity fields using apex:outputField components. Bind the Name, Amount, Close Date and Account Name fields to the apex:outputField components.The page must be named 'OppView'.
It must reference the Opportunity standard controller.
It must have an apex:outputField component bound to the Opportunity Name.
It must have an apex:outputField component bound to the Opportunity Amount.
It must have an apex:outputField component bound to the Opportunity Close Date.
It must have an apex:outputField component bound to the Account Name of the Opportunity.

My Answer:
<apex:page standardcontroller="Opportunity">
<apex:pageBlock>
   <apex:pageBlockTable >
      <apex:outputField value="{!Opportunity.Opportunity Name}"/>
      <apex:outputField value="{!Opportunity.Amount}"/>
      <apex:outputField value="{!Opportunity.Close Date}"/>
      <apex:outputField value="{!Opportunity.Account Name}"/>
   </apex:pageBlockTable>
</apex:pageBlock>
</apex:page>

Error Displaying:
Error: Missing required attribute value in <apex:pageBlockTable> in OppView at line 3 column 25

Please help to improve my knowledge