2024-2025 Chemistry 1- Semester 1 Final

Front

What is the boiling point of water compared to ammonia and hydrogen fluoride?

Back

Water has the highest boiling point due to stronger hydrogen bonds.

Front

What happens to table salt and sugar when heated?

Back

The salt melts, and the sugar does not.

Front

Why are alkali metals and halogens the most reactive elements?

Back

They tend to lose or gain electrons easily.

Front

Which category of elements usually forms negative ions?

Back

Nonmetals.

Front

Why do ionic compounds have higher melting points than molecular compounds?

Back

Attractive forces between ions are greater than those between molecules.

Front

What type of bond is formed between sodium and chlorine in table salt?

Back

Ionic bond.

Front

What is electronegativity?

Back

The tendency of an atom to attract electrons in a bond.

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds form from the transfer of electrons, while covalent compounds form from the sharing of electrons.

Front

What is a characteristic property of metals?

Back

Metals are good conductors of electricity.

Front

What is the significance of the octet rule?

Back

Atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.