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What are main group elements?

Groups with similar chemical properties.

How can you determine the number of valence electrons in a main group element?

Group number indicates the number of valence electrons.

What pattern connects rows in the periodic table?

Lower rows have more orbitals and energy levels.

What does Coulomb's Law describe?

The force between two charged particles depends on their charges and distance.

What happens to the force of attraction if particle charge increases?

The force of attraction increases.

Why are electrons attracted to the nucleus?

Opposite charges attract each other.

In which position do charges have the strongest pulling force?

When particles are closer together.

What is a core electron?

An electron closer to the nucleus than valence electrons.

How do core electrons differ from valence electrons?

Core electrons experience a greater force of attraction from the nucleus.

What is the shielding effect?

Valence electrons are repelled by core electrons but attracted to the nucleus.