Chemistry Flashcards
1
Q
What is a chemical change?
A
A chemical change is the formation of new products, e.g when a chemical reaction occurs
2
Q
What is a physical change
A
A substance that experiences a change is shape or state, or be mixed with something else.
3
Q
Facts about chemical changes:
A
- difficult to reverse
- Rearrange atoms meaning breaking and forming of bonds
- Atoms are not created of destroyed
4
Q
Signs of chemical change include
A
- Change in temperature
- Change in colour
- noticable odur
- Formation of solid precipitate
- Formation of bubbles
5
Q
Facts about physical changes:
A
- Easily reversable
- no formation of new substances
- space between atoms may increase or decrease
6
Q
What is in common between physical and chemical changes?
A
No atoms are created/ destroyed, the number of atoms present remain the same
