Reactions & Equations Flashcards
1
Q
What are the chemical reactions key features?
A
- compounds are broken up or formed
- at least 1 new substance is formed
- measurable energy change
- no atoms are created or destroyed
2
Q
What do chemical equations show?
A
What happens in a chemical reaction using words and symbols
3
Q
What are reactants in a chemical equation?
A
Chemical that are reacting(left)
4
Q
What are products in a chemical equation?
A
Chemical that are forming (right)
5
Q
Examples of a word and symbol equation for SodiumOxide
A
Word = sodium + oxygen —> Sodium Oxide Symbol = 4NA + O2 —> 2NA 2 O
6
Q
Why must equations be balanced?
A
Balanced = same number of atoms of each element on each side
Because atoms aren’t created or destroyed form a chemical reaction
