How many valance electrons do atoms in group 1 group 2 and groups 15 to 17 have?

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group1: +1
group2: +2
group15: -3
group16: -2
group17: -1
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Why do atoms of group 1 elements lose electrons to form cations where as atoms of group 17 elements gain electrons to form anions?

By doing so, both end up having a noble gas configuration, with 8 valence electrons (known as an octet). They do this to become chemically stable. They become stable as they have filled their outer shell of electrons. Atoms of groups 1 elements have only 1 electron in their outer shells, which means ( Full Answer )

How do the outer-shell electron configurations for ions of elements from groups 1 and 2 and 15 and 16 and 17 compare with those of the noble gases?

Answer . Elements in Group 1 have 1 more electron than the noble gas in the row above it. Elements in Group 2 have 2 more electrons than the noble gas in the row above it. Elements in Group 15 have 3 less electrons than the noble gas in the same row as it. Elements in Group 16 have 2 less ele ( Full Answer )

How many valance electrons are in the A group?

Group One on the periodic table consists of. Li - Lithium . Na - Sodium . k - Potassium . Rb - Rubidium . Cs - Cesium . All of these elements all have plus one (+1) valence electrons which means they have one too many so they will give it up when bonding occurs.

In the Periodic Table what do Group 1 and Group 17 have in common?

The chemical properties of elements in group 1 (the alkali metals) are:\nThey are the most reactive metals therefore they are always found in compounds in nature. Reactivity increases as atomic number increases, due to a lower IE (ionization energy).\nThey react with elements in group 17 to give the ( Full Answer )

A group of 2 or more atoms is what?

If the atoms are of the same element, it is called, I believe, a molecule.. If it is of two or more different elements, it is called a compound.

What is noticeable about all of the ionic charges in Group 1 2 15 16 and 17?

The ionic charges of group 1 and 2 metals are +1 and +2respectively. Group 15 & 16 the simple mono-atomic ions are -3and -2. Group 17 ions are -1. This can be explained by thefollowing elemnts in groups 1 and 2 lose 1 or 2electrons respectively to achieve a noble gas configuration whereasgroups 15 ( Full Answer )

What is the biggest atom in group 2?

Look for the highest numbered atom in the group: radium. Also barium has an empirical radius similar to the radius of radium: 215 pm.

How do elements in group 1 react with elements in group 15?

Elements in group 15 (or group 5) are non-metals. Thus, elements in group 1 lose electrons, forming positively charged cations, which are gained by elements in group 5, forming negatively charged anions. The attraction between anions and cations is known as an ionic bond. Example, the reaction betw ( Full Answer )

Group 2 elements have how many 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 - + Mg 2+

How many valence electrons are there in group 2?

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).

Why groups 1 and 2 form many compounds with groups 16 and 17?

Group 1 and 2 elements have 1 and 2 valence electrons respectively. Removal of these electrons will result in stable noble gas electronic configuration. Group 17 and 16 elements have 7 and 6 valence electrons respectively. Addition of 1 or 2 electrons to group 17 and 16 respectively will give them s ( Full Answer )

Why do group 1 atoms lose their outer electron?

They lose their electrons to become Ions because they have alot of outer shell and as a result, alot of electons. Think of a nucleus of an atom like the positive end of a magnet... The electrons are the negative end and opposites attract... The further away you place two magnets, the weaker the pull ( Full Answer )

How many valance electrons are in an atom that has 15 electrons?

The last letter represents how many valence electrons are. So: K: 2e L: 8e M: 5e The valence of the element is 3 (8-no. of valence electrons). Note that that formula is correct for nonmetals only. The element is P and has the electronic configuration [Ne]3s2 3p3 or 1s2 2s2 2p6 3s2 3p3. It h ( Full Answer )

Are electrons lost or gained in group 2?

They are lost. If it has a plus sign beside the ion charge, that means the atom loses electrons. But if it has a negative sign for the ion charge, that means that the atom gains electrons.

Are electrons in group 2 lost or gained?

They lose two electrons. If it says +2 that means that it loses two electrons, but if it says -2, it means that that atom gains two electrons.

Why do the elements in the group 1 and 2 react with group 17?

The group 1 and 2 elements have much lower electronegativity value than group 17 elements and therefore lose electrons to the group 17 elements. The group 17 elements require only one more electron to have a full valence shell and thereby acquire the stable electron configuration of the next higher ( Full Answer )

Why are atoms in groups 1 and 17 so reactive?

Group 1 elements have one valence electron. If they lose one electron, they will attain noble gas configuration and obey octet rule. Hence group 1 elements are reactive and tend to lose one electron. Group 17 elements have seven valence electron. If they gain one electron, they will attain noble ga ( Full Answer )

What type of ions do groups 1 2 15 16 and 17 form?

The most common type of ions are. Monopositive cation for group 1 elements, Dipositive cation for group 2 elements, Trinegative anions for group 15 elements, Dinegative anion for group 16 elements and mononegative anions for group 17 elements..