Structure and Properties
chemical Reactions
100

What is matter?


This describes anything that has mass and takes up space.


100

What is the first part of à chemical equation called ?

Reactants 

200

What is a physical change?


This type of change alters how something looks but does not create a new substance.


200

What is the second part of à chemical equation called?

Exothermic 


300

What is the melting point?


A solid changes to a liquid at this temperature point.


300

What is the law of conservation of matter?

The law of conservation of mass states that mass can’t créate or break in an isolated system. This means mass can’t créate only change its form.

400

what is kinetic energy?

A solid changes to a liquid at this temperature point.


400

What does O stand for in the periodic table?

Oxygen

500

What is endothermic?

When a substance changes from solid to liquid, it absorbs energy from its surroundings; this type of change is called this.


500

In the reaction 2H_2 + O_2 \rightarrow 2H_2O, 

What are the products?

2H+2O