Review - Atomic Theory & Electrons

Front

What is the formula to find the number of neutrons in an atom?

Back

Number of Neutrons = Mass Number - Atomic Number (Protons)

Front

How many valence electrons does Lithium have?

Back

Lithium has 1 valence electron.

Front

What is the relationship between wavelength, frequency, and energy of a wave?

Back

A wave with a large wavelength has a low frequency and low energy.

Front

How many electrons can a d sublevel hold?

Back

A d sublevel can hold 10 electrons.

Front

Who discovered the nucleus of the atom?

Back

Ernest Rutherford discovered the nucleus.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is the significance of the Lewis dot model?

Back

The Lewis dot model visually represents the valence electrons of an atom.

Front

What is the difference between an atom and an ion?

Back

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