Lithium and Sodium both have 2 valence electrons.
alkaline earth metals (group 2 elements) have two valence electrons
Radium is a group 2 element. All group 2 elements have 2 valence electrons. Thus, radium has 2 valence electrons.
A group of elements with two valence electrons are called alkaline earth metals. This group includes elements like magnesium and calcium. These elements are highly reactive due to their tendency to lose their two valence electrons.
Group II elements (also called alkaline earth metals), have two valence electrons. To fill their outer shell, they therefore become ions with two positive charges, such as magnesium: Mg -> 2e- + Mg2+
Group 2 metals have 2 valence electrons. In fact, the number of valence electrons of elements can be deduced from the group number (e.g. group VII elements have 7 valence electrons).
Calcium has 2 valence electrons, like all Group 2 elements.
Copper (Cu) has 2 valence electrons. It is located in the middle group of elements, called Transition Metals, and all transition metals have 2 valence electrons...hope that helped! =D
Lithium and Sodium both have 2 valence electrons.
alkaline earth metals (group 2 elements) have two valence electrons
The group number of A elements in the AB numbering system indicates the number of valence electrons. For example, elements in Group 1 have 1 valence electron, elements in Group 2 have 2 valence electrons, and so on. Valence electrons are important because they determine the chemical properties and reactivity of an element.
Radium is a group 2 element. All group 2 elements have 2 valence electrons. Thus, radium has 2 valence electrons.
A group of elements with two valence electrons are called alkaline earth metals. This group includes elements like magnesium and calcium. These elements are highly reactive due to their tendency to lose their two valence electrons.
Helium has 2 valence electrons. Group 2 elements (alkaline earth metals) also have 2 valence electrons.
Group II elements (also called alkaline earth metals), have two valence electrons. To fill their outer shell, they therefore become ions with two positive charges, such as magnesium: Mg -> 2e- + Mg2+
Group 1: have 1 valence electrons (half filled s orbital) Group 2: have 2 valence electrons (completely filled s orbital)
To find the valence electrons in an atom, look at the group number on the periodic table. The group number tells you how many valence electrons an atom has. For example, elements in group 1 have 1 valence electron, elements in group 2 have 2 valence electrons, and so on.