Atoms and Elements 8th

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How many protons does carbon have?

Back

Carbon has 6 protons.

Front

What is a dot diagram?

Back

A dot diagram (or Lewis dot structure) represents the valence electrons of an atom as dots around the element's symbol.

Front

Where are electrons located in an atom?

Back

Electrons are located in the outer rings (or energy levels) surrounding the nucleus.

Front

What is the atomic number of helium?

Back

The atomic number of helium is 2.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons in the nucleus.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom, contributing to its mass.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is an isotope?

Back

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

Front

How do you determine the number of neutrons in an atom?

Back

To find the number of neutrons, subtract the atomic number from the atomic mass.