Atomic Structure Quiz

Basic Particle of Chemical Elements

• Atoms are the fundamental units of chemical elements, serving as the smallest units that retain the properties of those elements.

Distinguishing Atoms

• Atoms are distinguished by their atomic number, which is defined by the number of protons in the nucleus.
• The arrangement of electrons around the nucleus also contributes to the unique characteristics of different elements.

Isotopes

• Atoms with the same number of protons but different numbers of neutrons are called isotopes.
• Isotopes of an element share chemical properties but can differ in mass and stability.

Atomic Charge

• An atom that has more electrons than protons carries a negative overall charge and is termed an anion.
• Conversely, if an atom has more protons than electrons, it holds a positive charge, known as a cation.

Atomic Mass Composition

• More than 99.94% of an atom's mass is constituted by its nucleus, which contains protons and neutrons.
• Electrons contribute minutely to the overall mass of the atom due to their negligible mass compared to protons and neutrons.