Physical Science Midterm

Front

What is the coefficient needed to balance the equation: 4 Al + 3 O₂ ----> ___ Al₂O₃?

Back

2

Front

Which substance is a gas at 45°C: Ethanol, Hexane, Methane, or Methanol?

Back

Methane

Front

What is the process called when two nuclei join together to form a single nucleus with a larger mass?

Back

Nuclear fusion

Front

What is an example of a chemical reaction?

Back

Two solutions mixed in a beaker produce a solid.

Front

What best describes compounds with covalent bonds?

Back

They share electrons to form bonds.

Front

What is the definition of a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is the difference between nuclear fusion and nuclear fission?

Back

Nuclear fusion combines nuclei to form a larger nucleus, while nuclear fission splits a nucleus into smaller parts.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a covalent bond?

Back

A chemical bond that involves the sharing of electron pairs between atoms.

Front

What is the significance of the periodic table in chemistry?

Back

It organizes elements based on their atomic number, electron configuration, and recurring chemical properties.