Chemistry Review Quiz

What is a chemical reaction?

• A process that leads to the creation of new elements

• A process that leads to the transformation of physical substances

• A process that leads to the separation of chemical substances

• A process that leads to the transformation of one set of chemical substances to another

What are the different types of chemical reactions?

• Addition, subtraction, multiplication, division

• Synthesis, decomposition, single displacement, double displacement, and combustion

• Solid, liquid, gas, plasma

• Acidic, basic, neutral, alkaline

Explain the law of conservation of mass in the context of chemical reactions.

• The mass of the products is always greater than the mass of the reactants.

• The mass of the reactants decreases during a chemical reaction.

• Total mass of the reactants is equal to the total mass of the products.

• The law of conservation of mass only applies to solid substances.

What is the periodic table and how is it organized?

• The periodic table is organized by atomic number and recurring chemical properties.

• The periodic table is organized by the date of discovery of the elements.

• The periodic table is organized by color and alphabetical order.

• The periodic table is organized by size and weight of the elements.

How many elements are there in the periodic table?

• 50

• 64

• 92

• 118

What is an atomic structure and what are its main components?

• The main components of an atomic structure are electrons, photons, and neutrons.

• The main components of an atomic structure are protons, neutrons, and positrons.

• The main components of an atomic structure are protons, electrons, and photons.

• The main components of an atomic structure are protons, neutrons, and electrons.

What is an atom and what are its subatomic particles?

• Protons, electrons, and positrons

• Neutrons, electrons, and quarks

• Protons, neutrons, and electrons

• Photons, neutrons, and electrons

Explain the concept of atomic number and atomic mass.

• The atomic number is the number of neutrons in the nucleus of an atom, and the atomic mass is the total mass of protons and electrons in a single atom.

• The atomic number is the total mass of protons, neutrons, and electrons in a single atom, and the atomic mass is the number of protons in the nucleus of an atom.

• The atomic number is the number of electrons in the nucleus of an atom, and the atomic mass is the total mass of protons and neutrons in a single atom.

• The atomic number is the number of protons in the nucleus of an atom, and the atomic mass is the total mass of protons, neutrons, and electrons in a single atom.

What is the difference between an element and a compound?

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

• An element is a mixture of different substances, while a compound is a pure substance

• An element is a substance that cannot be broken down into simpler substances, while a compound is a substance that can be broken down into simpler substances

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

What is the role of electrons in a chemical bond?

• Electrons are not involved in chemical bonding.

• Electrons in the outermost shell of an atom are involved in chemical bonding.

• Electrons in the nucleus of an atom are involved in chemical bonding.

• Electrons in the innermost shell of an atom are involved in chemical bonding.