Final Review( 1st Semester)

Front

What is the correct Lewis dot structure for the molecule fluorine (F₂)?

Back

The correct Lewis dot structure for fluorine (F₂) is represented by option B.

Front

How are ionic bonds formed?

Back

Ionic bonds are formed by the transfer of electrons from one atom to another.

Front

What type of reaction is represented by the equation C₄H₁₂ + O₂ → CO₂ + H₂O?

Back

This reaction is a combustion reaction.

Front

What do group numbers on the periodic table help us determine?

Back

Group numbers help us determine the number of valence electrons in an element.

Front

Balance the equation: __H₂O₂ → __H₂O + __O₂

Back

The balanced equation is 2H₂O₂ → 2H₂O + O₂.

Front

What is a covalent bond?

Back

A covalent bond is formed when two atoms share electrons.

Front

Define a chemical reaction.

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number and properties, helping predict their behavior.