Atomic Theory

The symbol Ar stands for the element

The fundamental particle of a chemical element according to Dalton's theory

A formula is used to represent

The probability map for an electron is called

The first scientist to show that atoms emit tiny negative particles

The most abundant element in the human body

The atom with 32 neutrons and 29 protons has a mass number of

An atom with 19 protons and 20 neutrons is an atom of

How many protons are in the nucleus of an aluminum atom?

Atoms of the same element having the same atomic number, but different numbers of neutrons, are called

The scientist whose alpha particle scattering experiment led him to conclude that the atom contains a nucleus

Which particles make the greatest contribution to the chemical properties of an atom?

A substance composed of two or more elements joined together in a specific way

Which color of visible light has the most energy per photon?

How many protons, electrons, and neutrons, respectively, does ¹⁷₈ O have?

The number of neutrons in one atom of ⁴²₂₀Ca is

Which color of visible light has the least amount of energy per photon?

We usually use the term ________ for all forms of electromagnetic radiation.

The ______ indicates the number of waves that pass a given point per second.

The ________ indicates how fast a given peak of a wave moves through space.

Which particle has the smallest mass?

The most abundant element on the earth

A packet of energy of electromagnetic radiation is called

The lowest possible energy state of an atom is called its _______ state.

The number of protons in the nucleus of an atom is called its

The number of protons plus the number of neutrons per atom is called the

The chemical symbol for the element cobalt

The energy levels of atoms are _________, meaning that only certain discrete energy levels are allowed.

The distance between two successive peaks or troughs in a wave is called the