Gizmo Warm-up A chemical change. (or chemical reaction) occurs when one

or more substances, called reactants, are transformed into

different substances, or products. In the Chemical Changes

Gizmo, you will look for evidence of chemical changes by

looking at changes you can see, touch, or smell.

To begin, check that Reactant 1 is Sodium and Reactant 2

is Water. Sodium is a metal so soft you can cut it with a knife.

1. Click Play ( ). What do you observe?

2. Do you think a chemical reaction has taken place? Explain.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

idk i’m struggling too