Chapter 5 Test Review

Front

What is the electron configuration for an oxygen atom?

Back

1s² 2s² 2p⁴.

Front

Which element in row 5 of the periodic table has 1 valence electron?

Back

Rubidium (Rb).

Front

What is the wavelength of violet light with a frequency of 7.5x10¹⁴ Hz?

Back

4.0x10⁻⁷ m.

Front

How many valence electrons does an element with 5 valence electrons have?

Back

5.

Front

What is a packet of electromagnetic energy called?

Back

Photon.

Front

Define valence electrons.

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is the significance of the periodic table?

Back

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

Front

What is the formula to calculate the wavelength of light?

Back

Wavelength (λ) = Speed of light (c) / Frequency (f).

Front

What is the maximum number of electrons in the second energy level?

Back

8 electrons.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.