Science Flashcard

Front

What are noble gases?

Back

Noble gases are a group of elements in Group 18 of the periodic table that are characterized by having a full outer energy level, making them mostly unreactive.

Front

Why do noble gases not pair with other elements?

Back

They have a full outer energy level.

Front

Where is lead (Pb) located on the periodic table?

Back

Lead (Pb) is located in Group 14, Period 6 of the periodic table.

Front

What is the most abundant gas in Earth's atmosphere?

Back

Nitrogen is the most abundant gas in Earth's atmosphere, making up about 78%.

Front

What does it mean for elements to be in the same group on the periodic table?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

What are the three main subatomic particles in an atom?

Back

The three main subatomic particles are protons (positive charge), neutrons (no charge), and electrons (negative charge).

Front

How can a model of an atom be improved to represent more properties?

Back

By using smaller marbles to represent electrons, which are much smaller than protons and neutrons.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number of an element and its identity.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and reactions.