Review: Atomic Particles and Theories

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What happens when an atom has more electrons than protons?

Back

The atom becomes a negatively charged ion.

Front

Who proposed the 'plum pudding' model of the atom?

Back

J.J. Thomson proposed the 'plum pudding' model, which describes the atom as a positively charged cloud with embedded negative electrons.

Front

How many periods are there in the periodic table?

Back

There are 7 periods in the periodic table.

Front

What is the significance of the Bohr model of the atom?

Back

The Bohr model describes electrons orbiting the nucleus at specific distances and explains how they can absorb or emit energy when jumping between these orbits.

Front

What is the atomic structure of hydrogen?

Back

Hydrogen is the simplest atom, consisting of one proton and one electron.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.

Front

What is the atomic number?

Back

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