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Scientific Method
Atoms
pH Scale
Chemical Reactions
Chemical Equations
100

What is the first step of the scientific method?

Ask a question
100

What are the three parts of an atom?

proton, neutron, and electron

100

Where do acids fall on the pH scale?

Between 1-6

100

What two things are formed when an acid and base react?

Water and Salt

100

What does the coefficient represent/mean in a chemical equation

2NaCl

The number of each substance needed

200

What is an independent variable?

The thing being changed during the expirament.
200

How can you determine the number of electrons in a given element?

Look at the atomic number

200

Where do the bases fall on the pH scale?

8-14

200

What type of reaction happens when an acid reacts with a base?

Neutralization 

200

Provide an example of a physical change AND an example of a chemical change

Physical: boiling, melting, cutting, crushing

Chemical: burning, rusting, decomposing

300

What is a hypothesis?

An educated guess or assumption of what will happen

300

How can you identify an ionic bond?

Formed between a metal and non metal, electrons are taken or given

300

Where does water fall on the pH scale?

7, Neutral

300

This type of reaction involves two or more substances combined to form one product

Synthesis

300

Balance this chemical equation:

Fe + Cl ------> FeCl3

2Fe + 3Cl ------> 2FeCl3

400

What is the purpose of a control group?

To compare all other results to.

400

How can you identify a covalent bond?

Between two non metals, shared electrons

400

What does pH stand for?

Potential of Hydrogen

400

This type of reaction involves a single reactant breaking down into two or more products

Decomposition reaction
400

Balance this equation:

NaOH + CaBr2 ---> Ca(OH)2 + NaBr

2NaOH + CaBr2 -----> Ca(OH)2 + 2NaBr

500

Sam wants to see if the amount of light effects the growth of her plants. What are some things that must be kept constant to ensure accuracy of the experiment?

soil type, pot size, amount of water, type of plant

500

Find the number of: 

Protons, Neutrons, and Electrons for the element 

Oxygen

Protons (atomic #): 8

Neutrons (atomic mass-atomic #): 8

Electrons (atomic #): 8

500

This acid, typically found in citrus, has a pH typically around 3. What is it?

Citric Acid

500

This law states that, mass is neither created nor destroyed in a chemical reaction

Law of Conservation of Mass

500

Provide at least two signs that a chemical change has occured.

release of light, temperature change, odor change, color change, gas given off, sudden appearance of a solid.