The modern periodic table is based closely on the ideas he used ... all have the same kind of reaction with water. The group of elements below were grouped together because they tended to combine ...

4th Period: Potassium and Calcium—Electrons go into the fourth energy level. A small piece of sodium metal is placed in water. The sodium reacts with the water and gets very hot, producing sodium ...

Scientists have discovered the elusive properties hidden within promethium, a rare earth element that has remained largely ...

An alternative periodic table of elements focusing on highly charged ions reveals new science that could support the quest ...

Test your knowledge and compete with other Live Science readers to see who can come top in our periodic table quiz. The ...

That is because about 60 per cent of our body consists of water (H2O), which is made of ... These are almost one-quarter of the periodic table and are mainly found in the first four periods.

Accompanying Lesson Plan: Lesson 3.2: Finding Volume—The Water Displacement Method The chart shows that atomic size and mass for the first 20 elements in the periodic table. The size of the atoms and ...

When the first periodic table was formulated by Mendeleev ... ways to protect steel from corrosion when it is in contact with water, even at high temperatures and pressures, is to use a coating ...

That’s why this periodic table clock really caught our eye. [gocivici]’s idea is a simple one: light up three different elements with three different colors for hours, minutes, and seconds ...