Match the following words to their descriptions.
Column A
1. The smallest unit of matter
2. Two atoms held together by an ionic bond
3. Two atoms held together by a covalent bond
4. Si
5. NaCI
6. CO2
Column B.
A. Atom
B. Molecule
C. Compound
Column A:
1. The smallest unit of matter - A
2. Two atoms held together by an ionic bond - C
3. Two atoms held together by a covalent bond - B
4. Si - A
5. NaCI - C
6. CO2 - B
Column A Column B
1. The smallest unit of matter A. Atom
2. Two atoms held together by an ionic bond C. Compound
3. Two atoms held together by a covalent bond B. Molecule
4. Si A. Atom
5. NaCI C. Compound
6. CO2 B. Molecule
To match the words to their descriptions, let's analyze each term:
Column A:
1. The smallest unit of matter: This refers to the fundamental building block of matter, which is an atom. The answer is A. Atom.
2. Two atoms held together by an ionic bond: In an ionic bond, atoms gain or lose electrons to form charged particles called ions. These ions then attract each other. The answer is C. Compound, as two atoms together in an ionic bond form a compound.
3. Two atoms held together by a covalent bond: In a covalent bond, atoms share electrons to form a stable molecule. The answer is B. Molecule, as two atoms in a covalent bond form a molecule.
4. Si: This symbol represents the element silicon in the periodic table. It is neither an atom nor a bond. The answer is not listed in the options provided.
5. NaCI: This chemical formula represents the compound sodium chloride, otherwise known as table salt. It is formed by an ionic bond between a sodium atom (Na) and a chlorine atom (Cl). The answer is C. Compound.
6. CO2: This chemical formula represents the molecule carbon dioxide, which is formed by a covalent bond between one carbon atom (C) and two oxygen atoms (O). The answer is B. Molecule.
Therefore, the matching is as follows:
1. The smallest unit of matter: A. Atom
2. Two atoms held together by an ionic bond: C. Compound
3. Two atoms held together by a covalent bond: B. Molecule
4. Si: Not listed in the options
5. NaCI: C. Compound
6. CO2: B. Molecule