Students look more deeply into the structure of the atom and play a game to better understand the relationship between protons, neutrons, electrons, and energy levels in atoms and their location in ...

That pun is based on the fact that the main building blocks in the branch of science are chemical elements, pure substances made from a single type of atom. But how many of these elements do you know?

The Periodic Table, first compiled by Russian chemist Dmitri Mendeleyev, is organized by the number of protons in the nucleus of each element's atom, known as the atomic number. The elements are ...

The more protons an atom has in its nucleus, the more strongly the electrons will be attracted and the more energy will be given out. As we know, atomic number is also known as proton number, and it ...

This energy level model shows two electrons on the first energy level and six electrons on the second energy level. Since this atom has a total of eight electrons, it also has eight protons. The atom ...

The numbers of subatomic particles in an atom can be calculated from its atomic number and mass number. The periodic table - AQA Mendeleev made an early periodic table. In the modern periodic ...

Chemists use symbols and formulae to represent elements and compounds. Word equations and balanced chemical equations represent the changes that happen in chemical reactions. Mixtures - AQA There ...

In recent decades, researchers have pushed the boundaries of the periodic table, synthesizing the heaviest elements known to ...

Electronegativity, an essential characteristic of all elements in the periodic table, measures an atom's ability to attract electrons towards itself within a chemical bond. This vital theoretical ...

Test your knowledge of the periodic table and see if you can top the leaderboard ... pure substances made from a single type of atom. But how many of these elements do you know?

If an atom has 2 protons, that’s an atom of the element helium. If it has 7 protons, that’s nitrogen. But the logic of the periodic table also relies upon the number and organisation of electr ...