Physical Properties
The Atom
Chemical Reactions
Periodic Table
Law Of Conversation
100

What is the definition of chemical reaction?

A chemical reaction includes the production of a gas,bubbling, a change in temperature,the production of a precipitate,or a color change. 

100

Where are protons located and what is their charge?

Protons are located in the nucleus and are positively charged.

100

What is a reactant?

A reactant is the substance at the beginning of a substance.

100

What are three characteristics of an non-metal?

1.Not Shiny

2.Not Ductile

3.May be Solid,liquid,or gas

100

What is the definition of mass?

Mass is neither created nor destroyed in a chemical reaction.

200

What is a subscript used for?

A subscript is used to show the number of hydrogen atoms.

200

Where is the neutrons located and what is the charge?

Neutrons are found in the nucleus and have no charge.

200

What is a product?

A product is the substance that is produced by the chemical reaction.

200

What is an chemical formula also called?

Chemical formulas, are also called molecular formulas which are used to represent the chemical make-up of a particular molecule.

200

What is Balanced chemical equations 

You will always have the same mass before the reaction as you do after the reaction.

300

What do chemical equations describe?

Chemical equations describe the reaction using a formula.

300

Where is the electrons located and what is the charge?

Electrons are located in the electron cloud outside of the nucleus and are negatively charged.

300

What is the definition of a chemical change?

Chemical properties are properties that can only be observed when substances undergo a change in identity.

300

How is the periodic table set up?

The periodic table is made up of groups and periods.

400

What is a coefficient?

A coefficient shows how many molecules of an substance are involved in the reaction.

400

What was Bohr's contribution to our understanding of atomic structure? 

Orbiting electrons

Energy Level

400

How do you know when a chemical change is formed?

1.Acidity

2.Reactivity

3.Basicity

400

Where is metal located on the periodic table?

A metal is located on the left side of the bold stair step on the periodic table.

500

When can you be told a physical change has formed?

1.Shape

2.Odor

3.Color

4.Density

500

What is a valence electron?

A valence electron are the electrons in the outer shell that bond with other atoms.

500

What does chemical reaction consist of?

All chemical reactions consist of a reactant and a product.

The reactants combine to form a new product.

500

What are the characteristics of metalloids?

Metalloids have properties of both metals and nonmetals.Some have good conductors in electronic devices like silicon.

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