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An element belongs to 3rd period and second group of the periodic table A) state number of valence electrons in it B) it is a metal or a nonmetal C) name the element D) write the formula of oxides?
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Most Upvoted Answer
An element belongs to 3rd period and second group of the periodic tabl...
🏅A) 2 valence electrons.
🏅B) Metal.
🏅C) Magnesium .
🏅D) MgO.
Community Answer
An element belongs to 3rd period and second group of the periodic tabl...
Valence electrons
- The element belongs to 2nd group, therefore it has 2 valence electrons.

Metal or nonmetal
- The element belongs to the 2nd group, which means it is a metal.

Name of the element
- The element belongs to the 3rd period and the 2nd group, which means it is Beryllium (Be).

Formula of oxides
- Beryllium can form two types of oxides: BeO (beryllium oxide) and BeO2 (beryllium dioxide).
- Beryllium oxide has the formula BeO, and it is formed by the reaction of beryllium with oxygen.
- Beryllium dioxide has the formula BeO2, and it is formed by the reaction of beryllium with excess oxygen.
- Beryllium oxide is an amphoteric oxide, which means it can react with both acids and bases to form salts.
- Beryllium oxide is used in the production of ceramics, glass, and electronic components, while beryllium dioxide is used in the production of nuclear reactors and as a catalyst in organic chemical reactions.
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Read the given passage and answer the questions:Metallic Character: The ability of an atom to donate electrons and form positive ions (cation) is known as electro-positivity or metallic character. Down the group, metallic character increases due to increase in atomic size and across the period, from left to right electropositivity decreases due to decrease in atomic size. Non-Metallic Character: The ability of an atom to accept electrons to form a negative ion (anion) is called non-metallic character or electronegativity. The elements having high electro-negativity have a higher tendency to gain electrons and form anion. Down the group, electronegativity decreases due to increase in atomic size and across the period, from left to right electro -negativity increases due to decrease in atomic size.Hydrogen is placed along with Alkali metals in the modern periodic table though it shows nonmetallic character

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An element belongs to 3rd period and second group of the periodic table A) state number of valence electrons in it B) it is a metal or a nonmetal C) name the element D) write the formula of oxides?
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