IPC Fall Semester Exam

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which also equals the number of electrons in a neutral atom.

Front

How many electrons does an element with atomic number 8 have?

Back

8 electrons.

Front

What type of bond forms in diatomic nitrogen (N₂)?

Back

Covalent bond.

Front

What is a diatomic molecule?

Back

A diatomic molecule is composed of two atoms bonded together, which can be of the same or different elements.

Front

In a neutral atom of carbon, how many protons, neutrons, and electrons are present?

Back

6 protons, 6 neutrons, and 6 electrons.

Front

What is the coefficient of O₂ in the reaction 2H₂ + O₂ → 2H₂O?

Back

The coefficient of O₂ is 1.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

In the reaction CH₄ + 2O₂ → CO₂ + 2H₂O, what are the products?

Back

CO₂ and H₂O.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction; the mass of reactants equals the mass of products.

Front

What is a covalent bond?

Back

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