Unit 3 review

Front

What is the definition of precision in measurements?

Back

Precision is a measure of how close measurements come to each other when they are made in the same way.

Front

What type of bond is formed between two nonmetals?

Back

A bond between a nonmetal and a nonmetal is called a covalent bond.

Front

How many valence electrons does an oxygen atom have?

Back

Oxygen has 6 valence electrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the difference between precision and accuracy in measurements?

Back

Precision refers to the closeness of measurements to each other, while accuracy refers to how close a measurement is to the true value.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Front

What are valence electrons and why are they important?

Back

Valence electrons are the electrons in the outermost shell of an atom and are important for determining how an atom will bond with others.

Front

What is the significance of the positive charge of protons in an atom?

Back

The positive charge of protons helps to determine the atomic number of an element and contributes to the overall charge balance in an atom.

Front

How do the charges of protons and electrons affect atomic structure?

Back

The positive charge of protons and the negative charge of electrons create an electrostatic force that holds the atom together.