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Scientific Method and Chemical Elements Quiz

15 Questions

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Scientific Method and Chemical Elements Quiz

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Questions and Answers

What is the first step in the scientific method?

Design and perform experiments to test the hypothesis

Form a hypothesis

Make an observation (correct)

Accept or modify the hypothesis based on the experimental results

Why are about 25 elements essential to life?

Because these elements are highly reactive

Because they are used to form compounds necessary for living organisms (correct)

Because they are the most abundant elements in the universe

Because these elements are found in large quantities in nature

What is the structure of an atom?

Protons, electrons, and isotopes

Molecules, ions, and isotopes

Protons, neutrons, and electrons (correct)

Neutrons, ions, and atomic mass

Which type of bond is a substance consisting of two or more different elements in a fixed ratio?

Covalent bond Signup and view all the answers

What makes up about 96% of the weight of most living organisms?

Oxygen, carbon, nitrogen, and hydrogen Signup and view all the answers

What is the last step in the scientific method?

Use the results to make a new hypothesis Signup and view all the answers

What type of bond is formed when electrons are transferred between two atoms?

Ionic bond Signup and view all the answers

Which type of bond results in electrons being shared equally between two atoms?

Non-polar covalent bond Signup and view all the answers

What is the role of hydrogen bonds in water's behavior?

Causing high surface tension Signup and view all the answers

In which type of solution is water the solvent?

Aqueous solution Signup and view all the answers

What is the pH range of the pH scale?

0 to 14 Signup and view all the answers

What do buffers do in relation to pH?

Minimize changes in pH Signup and view all the answers

What is an element in chemistry?

A substance that cannot be broken down into other substances Signup and view all the answers

What do isotopes of an element have in common?

Same number of protons and neutrons Signup and view all the answers

What type of bond results from a partial positive charge on hydrogen?

Hydrogen bond Signup and view all the answers

Scientific Method and Chemical Elements Quiz

Choose a study mode

Podcast

Questions and Answers

What is the first step in the scientific method?

Why are about 25 elements essential to life?

What is the structure of an atom?

Which type of bond is a substance consisting of two or more different elements in a fixed ratio?

What makes up about 96% of the weight of most living organisms?

What is the last step in the scientific method?

What type of bond is formed when electrons are transferred between two atoms?

Which type of bond results in electrons being shared equally between two atoms?

What is the role of hydrogen bonds in water's behavior?

In which type of solution is water the solvent?

What is the pH range of the pH scale?

What do buffers do in relation to pH?

What is an element in chemistry?

What do isotopes of an element have in common?

What type of bond results from a partial positive charge on hydrogen?

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