🔸 What is a Block?
A block is a container of data in a blockchain network. Each block typically contains:
A timestamp

A list of transactions

A reference (hash) to the previous block

A nonce (used in mining)

The block’s hash

🔗 The Chain
Each block is linked to the previous one using hashes. This chain-like structure is what gives blockchain its name.
🖥️ Nodes
Nodes are individual computers that participate in the blockchain network. They:
Store a copy of the entire blockchain

Validate and relay transactions

Help reach consensus