What is special about Group 1 in the periodic table?
All the Group 1 elements are very reactive . They must be stored under oil to keep air and water away from them. Group 1 elements form alkaline solutions when they react with water, which is why they are called alkali metals.
What does Group 1 in the periodic table contain?
The alkali metals are six chemical elements in Group 1, the leftmost column in the periodic table. They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
What properties do Group 1 have?
Group 1 – physical properties
- are soft (they can be cut with a knife)
- have relatively low melting points.
- have low densities.
What is the strongest element in group 1?
lithium
Unexpectedly, lithium is the strongest reductant, and sodium is the weakest (Table 21.3 “Selected Properties of the Group 1 Elements”).
Which element is most active in group 1?
Reactivity of Group 1 Elements The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal and francium (Fr) is the most reactive. Because alkali metals are so reactive, they are found in nature only in combination with other elements.
Do group 1 metals conduct heat?
Alkali metals are extremely good conductors of electricity and heat.
Can group 1 metals conduct electricity?
Yes, group 1 metals can conduct electricity.
How do group 1 elements react with water?
All the alkali metals react vigorously with cold water. In each reaction, hydrogen gas is given off and the metal hydroxide is produced. The speed and violence of the reaction increases as you go down the group.
Why do group 1 metals lose an electron?
The reactivity of Group 1 elements increases as you go down the group because: the atoms get larger. the outer electron gets further from the nucleus. the attraction between the nucleus and outer electron gets weaker – so the electron is more easily lost.
What makes group 1 metals so reactive?
Group 1 of the periodic table includes hydrogen and the alkali metals. Because they have just one valence electron, group 1 elements are very reactive. As a result, they are found in nature only in combination with other elements.
Why do group 1 elements react with water?
Group 1 elements are called alkali metals because of their ability to displace H2(g) from water and create a basic solution. Alkali metals are also known to react violently and explosively with water. This is because enough heat is given off during the exothermic reaction to ignite the H2(g).