Year 10 - Reactions (Intro, equations conservation of mass)

Front

What is the word equation for the reaction of iron and sulfur?

Back

iron + sulfur → iron sulfide

Front

Is the equation Al + O2 → 2Al2O3 balanced?

Back

No!

Front

What coefficient is needed to balance the equation N2 + O2 → _ NO?

Back

2

Front

Atoms combine to form _______.

Back

molecules

Front

What does the periodic law state about the arrangement of elements?

Back

Elements are arranged according to their atomic numbers so that elements with similar chemical properties are in the same column and properties repeat periodically.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What are reactants in a chemical equation?

Back

Substances that undergo a chemical change.

Front

What are products in a chemical equation?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides.