John Dalton – the man and the myth

John Dalton is one of the pioneers who transformed chemistry into the science that we enjoy today. His name is irrevocably linked with the atomic theory that underlies our modern...

Solar polarization paradox resolved at last

Careful numerical modelling shows that the discrepancy between solar observations and atomic theory vanishes after complex, previously neglected interactions are considered.

Atomic Structure and Isotopes

Atomic Structure and Isotopes covers the fundamentals of the atomic theory of matter. Dalton’s atomic theory is summarized along with the laws derived from it. The basic structure of the atom is reviewed with emphasis on calculations involving atomic number and mass number. The concepts of isotopes and relative atomic masses are presented from a quantitative viewpoint.

The building blocks of matter

The question of what everything around us is made from has fascinated humanity since ancient times. The development of ideas on what the building blocks of matter are, and how these building blocks come together to form materials, are discussed in this contribution. In order to manipulate matter in a useful way, an understanding of the structure of the building blocks is the key. For this reason, atomic theory and bonding theory are introduced. An explanation of the periodic table shows why it is such a powerful predictive tool, and the use of symbols in chemistry is discussed.Contribution: In this article, the historical development of key ideas in our understanding of matter is presented, along with some of the important ideas in understanding how matter behaves. As part of this special collection, the implications of the meaning and utilisation of this knowledge are also considered.

Some Current Trends in Atomic Theory

Atomic theory continues to develop even after a century of rapid progress [...]

Development of learning videos of atomic theory concepts of Tialo language

The purpose of this research is to produce a video learning content on atomic theory. This research uses the design and development design that employs the ADDIE model. The research instrument used was a questionnaire with a four-likert scale admistered on content experts, linguists, media experts, teachers and 10 students of MA AL-KHAIRAAT Tomini. The validity of the content, language and media aspects was said to be good with scores of 3.25; 3.33 and 3.28 respectively. Meanwhile, the scores obtained from teachers and students of class XI IPA were 3.87 and 3.51, both of which were in the "Strongly Agree" category. The results showed that the atomic theory learning video in the Tialo language was suitable for use in learning activities and could increase the concentration level of students. The theoretical implications of this research, namely the instructional video can increase learning motivation in students and the practical implication is that the instructional video is used as resources for teachers and prospective teachers to be used in the learning process.