is the a main group element?
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In chemistry and atomic physics, the main group is the group of elements (sometimes called the representative elements) whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements.
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Every element in the first column (group one) has one electron in its outer shell. Every element in the second column (group two) has two electrons in the outer shell. As you keep counting the columns, you'll know how many electrons are in the outer shell.
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Although many characteristics are common throughout the group, the heavier metals such as Ca, Sr, Ba, and Ra are almost as reactive as the Group 1 Alkali Metals. All the elements in Group 2 have two electrons in their valence shells, giving them an oxidation state of +2.
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The first chemical element is Hydrogen and the last is Ununoctium. Please note that the elements do not show their natural relation towards each other as in the Periodic system.
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Moving from the far left to the right on the periodic table, main-group elements tend to form cations with a charge equal to the group number. That is, group 1 elements form 1+ ions; group 2 elements form 2+ ions, and so on.
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Elements in the same group of the periodic table have similar chemical properties. Elements can be classified as metals, metalloids, and nonmetals, or as a main-group elements, transition metals, and inner transition metals.
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The group 18 elements include helium, neon, argon, krypton, xenon and radon. They are referred to as noble gases or inert gases.
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The group 18 elements include helium, neon, argon, krypton, xenon and radon. They are referred to as noble gases or inert gases. The general configuration of the valence shell is ns2np6. All of these elements occur in a free state in the atmosphere.
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The first element in the group is the nonmetal nitrogen (N), followed by phosphorus (P), another nonmetal. Arsenic (As) (Figure below) and antimony (Sb) are the metalloids in this group, and bismuth (Bi) is a metal. All group 15 elements have five valence electrons, but they vary in their reactivity.
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Group 2A elements are the alkaline earth metals and all have two electrons in the outermost energy level because their electron configuration ends in s2. Group 5A elements all have five electrons in the outermost energy level because their electron configuration ends in s2p3.
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Atoms of elements in this group have four valence electrons.
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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 3 and 4) are not numbered.
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Hydrogen (H), lithium (Li), and sodium (Na), as group 1 elements, have just one electron in their outermost shells. They are unstable as single atoms, but can become stable by losing or sharing their one valence electron.
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Explanation: The valence electrons for the representative (main) group of elements are found in the outermost (highest energy) s and p sublevels. They are often together called the valence shell. Electron configurations can make it easy to see the valence shells for the atoms of the elements.
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Why are the Group 1 Elements so Reactive ? The first three elements in Group 1 are Lithium, Sodium and Potassium and the three pictures below show the arrangement of electrons in their atoms. They have all got one electron in the outside shell even though they all have a different number of electrons in total.
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For groups 1-2 and 13-18, the valency is directly related to group number. So, elements in group one, the alkali metals, have one valence electron, those in group two have two valence, those in group thirteen have three electrons, and so on.
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Groups largely define how we think of ourselves. There are two main types of groups: primary and secondary. As the names suggest, the primary group is the long-term, complex one. People use groups as standards of comparison to define themselves—both who they are and who they are not.