Question

Which of the following combination of elementary substances may react to form a chemical compound made up of molecules?
- C(s) and Br2(I)
-I2(s) and Mg(s)
-O2(g) and Na(s)
- All of them react to produce compounds made up of molecules

Answer 1

Answer: -

Only C(s) and Br2(l)

Explanation: -

Ionic compounds are formed between metals and nonmetals.

We use the term molecule when covalent compounds are formed but not for ionic compounds. In the case for Na(s) and O2(g), an ionic compound is formed. Similarly between Mg (s) and I2(s) an ionic compound is formed.

Only between C(s) and Br2 (l) a covalent compound  gets formed. These compound is formed of molecules.

Answer 2

Answer:

Only C(s) and Br2 (I) react to form chemical compound made up of molecules.

Further detail:

Reason:

When C(s) and Br2 (I) react with each other, a covalent compound is formed and these compounds are made of molecules so the combination of these elementary substances react to form a chemical compound made up of molecules.

Other compounds form ionic bonds.

Covalent bond:

A covalent bond, also called a molecular bond, is a chemical bond that encompasses the sharing of electron pairs between atoms. These electron pairs are recognized as shared pairs or bonding pairs, and the constant balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.

Ionic bond:

Ionic bonding is the whole transmission of valence electron(s) concerning atoms. It is a type of chemical bond that produces two oppositely charged ions. In ionic bonds, the metal drops electrons to convert a positively charged cation, while the nonmetal receives those electrons to become a negatively charged anion.

Answer detail:

Subject: Chemistry

Level: Middle school

Keywords:

• Ionic bond

• Molecular bond

• Covalent bond

• Chemical compound made up of molecules

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