Reactions 1
Randoms
Atomic Structure
Reactions 2
Periodic Table
100

This energy from this type of reaction is often released through heat.

Exothermic 

100

What is a compound?

When one or more atoms combine together, they are called compounds

100

One of the three types of subatomic particles. [Has a positive charge]

Protons

100

The new substance formed in a chemical reaction.

Product

100

The three groups of elements on the periodic table.

Metals, metalloids, and nonmetals

200

Chemical reaction that absorbs energy and feels cold

Endothermic Reactions

200

The element with 21 protons

Scandium

200

All matter is composed of...

Atoms

200

A change in matter that does not result in a new substance.

Physical change

200

Tell 2 properties of metals

Shiny, malleable, conductive, ductile

300

Fire is a _________ reaction

Exothermic

300

What are the reactants in this reaction? 

Cr +     O2 →      Cr2O3

Cr and O2

300

The center of an atom

Nucleus

300

This law states that matter is never created nor destroyed.

The Law of Conservation of Mass

300

Tell 2 properties of nonmetals

Dull, brittle, poor conductors 

400

What elements and how many atoms: 3Na2OH3

Na = Sodium, 6

O = Oxygen, 3

H = Hydrogen, 9

400

What is the atomic number? 


79

400

This type of subatomic particle has a negative charge

Electron

400

If a chemical change has happened, a ___ happened as well.

Chemical reaction

400

The elements in last column of the periodic table are called

Nobel Gases

500

Balance the equation: 

Cr +     O2 →      Cr2O3

4Cr +     3O2 →      2Cr2O3

500

Look up element #73 and tell 2 of its properties

Shiny, ductile, malleable, good conductor

500

This type of particle does not have a charge

Neutron

500

The 4 main signs of a chemical reaction

Solid formation, gas formation, color change, temperature change

500

The elements in a column all share similar _______

properties

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