But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

Six-mark questions are extended open response questions. These require longer answers than the structured questions that have fewer marks. It is wise to plan your answer first by making some notes.

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

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This leads us to ask an important question: Is there a maximum number of elements included in the periodic table? The answer ...

This year we celebrate the 150 th anniversary of Mendeleev’s achievement in formulating the structure of the periodic table that we use today. He announced his structure in 1869, but the challenge of ...

So the next time you look at the periodic table, remember that it is not just a chart of elements ... the two museums will answer your burning questions about the fantastic world around us ...

Just four years before Mendeleev announced his periodic table, Newlands noticed that there were similarities between elements with atomic weights that differed by seven. He called this The Law of ...

Six-mark questions are extended open response ... and sodium were reacted separately with water. In the periodic table, the group 7 elements and the group 0 elements are non-metals.