Untitled Quiz

The smallest unit of an element, a pure substance forming ordinary matter.

The central part of an atom, containing protons and neutrons.

Positively charged particle in the atom's nucleus.

Non-charged particle in the atom's nucleus.

Negatively charged particle surrounding the nucleus.

The number of protons in an atom's nucleus, defining the element.

The total mass of protons and neutrons in an atom.

A pure substance consisting of a single type of atom.

Two or more atoms bonded together.

A substance formed when two or more elements combine chemically in a fixed ratio.

The number of protons in an atom's nucleus, also known as the atomic number, defines the element. Every element has a unique atomic number.

Elements are organized on the periodic table based on their atomic number, which is the number of protons in their atoms.

Atomic mass is the average mass of an atom, calculated from the number of protons and neutrons. It's a weighted average based on the abundance of isotopes.

Isotopes are atoms of the same element that have the same number of protons but differ in the number of neutrons. This leads to variations in their atomic mass.

An ion is an atom that has gained or lost electrons, resulting in an overall positive or negative charge. They are not neutral like regular atoms.

A cation is a positively charged ion formed when an atom loses electrons. It has more protons than electrons.

An anion is a negatively charged ion formed when an atom gains electrons. It has more electrons than protons.

Ions play a critical role in chemical bonding, forming ionic compounds. They also drive many biological processes, like muscle contraction and nerve impulses.

The periodic table is a chart that organizes all the known chemical elements by their atomic number, electron configuration, and recurring chemical properties.

An atom is a neutral particle with a specific number of protons. An ion is a charged atom with an imbalance of protons and electrons. An isotope is an atom with the same number of protons but a different number of neutrons.