Sem1 Mock ACP

Front

What is the number of atoms in three grams of gold?

Back

9.17 × 10^21

Front

What is the formula of calcium permanganate?

Back

Ca (MnO4)2

Front

Which statement is a chemical property of copper?

Back

It reacts with nitric acid.

Front

What best describes metallic bonding?

Back

The valence electrons between the metals become delocalized and can move freely between the metallic cations.

Front

What is the average atomic mass of an unknown element with isotopes?

Back

10.8 amu

Front

Define atomic mass.

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is an isotope?

Back

Atoms of the same element that have different numbers of neutrons.

Front

Explain the concept of delocalized electrons in metals.

Back

Electrons that are not bound to any specific atom and can move freely throughout the metallic structure.

Front

What is a chemical property?

Back

A characteristic of a substance that can only be observed during a chemical reaction.

Front

What is the significance of the octet rule in bonding?

Back

Atoms tend to bond in a way that gives them eight valence electrons, achieving a stable electron configuration.