Chemistry Chapter 3, 4 and 5 Review

Front

What is the density of tin and aluminum?

Back

The density of tin is 7.3 g/cm³ and aluminum is 2.7 g/cm³.

Front

What can be said about the density of a tin can coated with aluminum?

Back

Its density is between 2.8 g/cm³ and 7.3 g/cm³.

Front

What group does an atom with 6 valence electrons belong to?

Back

Chalcogens (Group 6A).

Front

What is the correct shell model for a magnesium atom?

Back

Magnesium has 12 electrons, arranged in 2, 8, 2.

Front

What color flame is produced by strontium hydroxide in a flame test?

Back

Red.

Front

What is the average atomic mass of boron given its isotopes?

Back

The average atomic mass of boron is about 10.6 amu.

Front

Define density in terms of mass and volume.

Back

Density is defined as mass per unit volume (Density = Mass/Volume).

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with others.

Front

What is an isotope?

Back

Isotopes are atoms of the same element with different numbers of neutrons.

Front

Explain the concept of atomic mass. How is it calculated?

Back

Atomic mass is the weighted average of the masses of an element's isotopes.