Chemistry Fall Review

Front

What is the electron configuration for Potassium?

Back

1s2 2s2 2p6 3s2 3p6 4s1

Front

Identify the element with the electron configuration: [Ar] 4s2 3d10 4p3.

Back

Gallium

Front

Which electromagnetic wave has the highest frequency?

Back

Gamma rays

Front

What is the average atomic mass of an element with two isotopes: 10.013 amu (19.9% abundance) and 11.01 amu (80.1% abundance)?

Back

10.812 amu, Boron

Front

Is Aluminum (Al) an element, compound, heterogeneous mixture, or homogeneous mixture?

Back

Element

Front

Define isotopes.

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the principle behind the periodic table organization?

Back

Elements are organized by increasing atomic number and similar chemical properties.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in the nucleus of an atom, determining the element's identity.

Front

Explain the difference between a compound and a mixture.

Back

A compound is a substance formed when two or more elements chemically bond, while a mixture is a combination of two or more substances that retain their individual properties.

Front

What is the formula for calculating average atomic mass?

Back

Average atomic mass = (mass of isotope 1 × abundance) + (mass of isotope 2 × abundance) + ...