Abeka 9th grade Science Quiz 25

Elements

Substances composed of a single type of atom are called ____________.

Proton

A subatomic particle that has a positive charge.

Chemical symbol

Each element is given an abbreviation called ___________.

Orbitals

According to the electron-cloud model, electrons move unpredictably through regions of space called ___________.

Mass number

The total number of protons and neutrons in an atom

Quarks

Scientist believe that protons and neutrons are composed of smaller particles called ____________.

Atoms

John Dalton proposed that all matter consists of tiny particles called ____________.

Isotopes

Atoms of the same element that have a different number of neutrons are ___________.

Heisenberg uncertainty principle

The principal stating that it is impossible to know both the position and velocity of an electron simultaneously

Quantum

The overall motion of each electron can be mathematically represented by four __________ numbers.