Elements and Compounds Test

Front

What is a compound molecule?

Back

A compound molecule is a substance formed when two or more different types of atoms bond together chemically.

Front

Is O2 a compound molecule?

Back

No, O2 is a diatomic molecule, not a compound, as it consists of only one type of atom (oxygen).

Front

What is HCN made of?

Back

HCN is made of three types of atoms: hydrogen (H), carbon (C), and nitrogen (N).

Front

What organizes all discovered chemical elements in rows and columns?

Back

The Periodic Table of Elements organizes all discovered chemical elements according to increasing atomic number.

Front

What does the term 'subscript' refer to in a chemical formula?

Back

A subscript indicates the number of atoms of an element in a molecule, appearing as a small number after the element's symbol.

Front

What is the difference between a coefficient and a subscript in a chemical formula?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms in a molecule.

Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter notation used to represent an element on the periodic table.

Front

What is the significance of the Periodic Table of Elements?

Back

The Periodic Table of Elements provides a systematic arrangement of elements, showing their properties and relationships.

Front

What does it mean if an element is in the same row of the periodic table?

Back

Elements in the same row (period) have the same number of electron shells.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element.