Molecules and Compounds

Front

What are chemical symbols?

Back

Chemical symbols are one or two-letter abbreviations used to represent elements on the periodic table, such as O for oxygen, Na for sodium, and S for sulfur.

Front

What are isotopes?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the chemical formula for a compound made of two iron atoms and three oxygen atoms?

Back

The chemical formula is Fe₂O₃.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

Is H₂ an element or a compound?

Back

H₂ is an element, specifically a diatomic molecule of hydrogen.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, which can be of the same or different elements.

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 a chemical formula?

Back

A chemical formula is a way of expressing the composition of a compound using symbols for the elements and numbers to indicate the ratio of atoms.

Front

What are the two main types of chemical bonds?

Back

The two main types of chemical bonds are ionic bonds and covalent bonds.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond formed through the transfer of electrons from one atom to another, resulting in the attraction between oppositely charged ions.