What are the 7 families of the periodic table?
Related elements, including the noble gases, halogens, alkali metals, alkaline earth metals, transition metals, lanthanides, and actinides.
What are the characteristics of the alkaline earth metal family?
Properties of Alkaline Earth Metals
- somewhat reactive metals at standard temperature and pressure.
- readily lose their two outermost electrons to form cations with a 2+ charge.
- low densities.
- low melting points.
- low boiling points.
Why are Group 2 called alkaline earth metals?
Beryllium, magnesium, calcium, strontium, barium and radium are the elements in Group 2. For two reasons, these elements are referred to as Alkaline Earth metals, Their oxides remain in the crust of the earth and are very heat-stable. The elements of Group 2 of the periodic table are alkaline earth metals.
What are the most common alkaline earth metals?
The most abundant of the alkaline earth metals on Earth is calcium which is the fifth most abundant element in the Earth’s crust….Here is the list in order:
What is a family of elements called?
In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns (between groups 2 and 3) are not numbered.
Why are alkaline earth metals very reactive?
Elements in group 2 of the periodic table are called alkaline Earth metals. Alkaline Earth metals are very reactive because they readily give up their two valence electrons to achieve a full outer energy level, which is the most stable arrangement of electrons.
Why beryllium is not included in alkaline earth metals?
Alkaline metals are called so because of two reasons: i) They are obtained from the earth in the form of ores. Beryllium fulfills the first criterion but not the second one, since its oxides and hydroxides show amphoteric behavior, rather than alkaline. So, it is not considered an alkaline earth metal.
What are the group 3 elements called?
Group 3A. Group 3A (or IIIA) of the periodic table includes the metalloid boron (B), as well as the metals aluminum (Al), gallium (Ga), indium (In), and thallium (Tl).
Which is the lightest element in the world?
Hydrogen is the lightest element and exhibits the simplest atomic structure.
Is potassium an alkaline earth metal?
The alkali metals are Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radium (Ra). The alkaline earth metals form oxide in the earth and they are soluble in water. This is the reason they are named so. Hence potassium is an alkali metal and not an alkaline earth metal.