Flashcard Atomic Theory and the Periodic Table

Front

What is the plum pudding model of the atom?

Back

A model proposed by J.J. Thomson suggesting that atoms are composed of a positively charged 'soup' with negatively charged electrons embedded within it.

Front

What are the characteristics of metals?

Back

Metals typically have high electrical conductivity, malleability, and ductility, but they usually do not have low melting points.

Front

What is the charge of a proton?

Back

Positive.

Front

What was John Dalton's major contribution to atomic theory?

Back

He proposed that atoms are indivisible particles.

Front

What is the main difference between Rutherford's and Bohr's atomic models?

Back

The concept of electron shells.

Front

Who discovered the electron?

Back

J.J. Thomson.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What are isotopes?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.