arranged by their atomic number. One never knows when one will need the properties of Rutherfordium in a hurry. See if you can organize the first 25 elements of the periodic table in order in the ...

This video is an interactive lesson in calculating an atom’s mass and atomic number. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of ...

In discussing halogen reactivity (as covered in Core Idea), it is a common practice to argue that as you go down the Group 17 elements it becomes harder for the elements to gain an electron to form a ...

Group 7 of the periodic table is something of an oddity. When the first periodic table was formulated by Mendeleev, it was the only group that contained just a single known element — manganese.

Keeping track of people determined to wreak havoc through computer hacks and cyber crime isn’t easy, but Microsoft officials ...

The couple behind a new Periodic Table of Greek Mythology believe that representing a more diverse range of voices is vital for 'anyone who ...

Flow Launcher has a lot of useful plug-ins for productivity. It also has some very unexpected ones, as we're about to see.

Lucky Number in Numerology is calculated based on your date of birth and the numerology number of your name. Determine your Lucky number using this lucky number calculator. Enter your name and date of ...

To submit a letter to The Age, email [email protected]. Please include your home address and telephone number. No attachments, please include your letter in the body of the email. See here for our ...

Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals. The term ‘halogen’ means ‘salt former’.

The highest priority group on each carbon atom can be on opposite sides of the double bond (E ... Chirality itself comes from the Greek kheir, meaning hand There are more stories to be found in the ...

Individuals and businesses can link a group of virtual card numbers to a central debit, credit or charge account and avoid excessive collection or distribution of plastic cards. This eliminates ...