Valence electrons

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

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Front

How many valence electrons do atoms in group 15 have?

Back

5

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Front

What is the significance of valence electrons in chemical reactions?

Back

Valence electrons determine how an element reacts with other elements and the types of bonds it can form.

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Front

Which group in the periodic table has the most valence electrons?

Back

Group 18 has the most valence electrons, which is 8.

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Front

What are the characteristics of elements in group 17?

Back

Elements in group 17 are highly reactive non-metals with 7 valence electrons.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons can be determined by the group number of the element in the periodic table.

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Front

What role do valence electrons play in ionic bonding?

Back

In ionic bonding, valence electrons are transferred from one atom to another, resulting in the formation of charged ions.

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Front

What role do valence electrons play in covalent bonding?

Back

In covalent bonding, valence electrons are shared between atoms to form molecules.

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Front

Can you name an element with 4 valence electrons?

Back

Carbon (C) has 4 valence electrons.

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Front

What happens to the reactivity of elements as you move from left to right across a period?

Back

Reactivity generally decreases for metals and increases for non-metals as you move from left to right across a period.

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