Chemistry · Atomic Structure & Periodic Trends

Chemistry — Atomic Structure & Periodic Trends

Build a clear model of atoms, electron configurations, and the recurring patterns in periodic properties.

20 cardsHigh school / introductory universityFoundational

A focused review

Topics covered

atomsperiodic tableelectron configurationchemistryAP Chemistry

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Question 01What does an element's atomic number represent?

Answer

The number of protons in the nucleus of each atom of that element.

Question 02What makes two atoms isotopes of the same element?

Answer

They have the same number of protons but different numbers of neutrons.

Question 03How do you calculate the mass number of a nuclide?

Answer

Add the number of protons and neutrons in its nucleus.

Question 04What is an ion?

Answer

An atom or group of atoms with a net charge because electrons have been gained or lost.

Question 05How does a cation form?

Answer

An atom or molecule loses one or more electrons and becomes positively charged.

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