Atomic Structure and Periodic Table

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). For example, the atomic mass of hydrogen is approximately 1.00794 amu.

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in an atom's nucleus, which also equals the number of electrons in a neutral atom.

Front

What are periods in the periodic table?

Back

Periods are the horizontal rows in the periodic table, indicating the number of electron shells an element has.

Front

What are groups (or families) in the periodic table?

Back

Groups (or families) are the vertical columns in the periodic table, indicating elements that have similar chemical properties.

Front

Which element is in Period 4, Group 8?

Back

Iron (Fe) is located in Period 4, Group 8 of the periodic table.

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 (rounded to the nearest whole number).

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 the difference between metals and non-metals?

Back

Metals are typically shiny, malleable, and good conductors of heat and electricity, while non-metals are usually dull, brittle, and poor conductors.

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

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding and reactions.