Exploring Atomic Structure and the Periodic Table

What is the atomic number of an element determined by?

• Number of neutrons

• Number of isotopes

• Number of electrons

• Number of protons

Which element is formed by adding two protons to the nucleus?

• Hydrogen

• Helium

• Lithium

• Beryllium

What does the atomic number of helium indicate?

• Number of neutrons

• Number of electron shells

• Number of protons

• Number of valence electrons

How many electrons does the first electron shell hold when full?

• 2 electrons

• 8 electrons

• 32 electrons

• 18 electrons

What is the maximum number of electrons in the second electron shell?

• 10 electrons

• 18 electrons

• 8 electrons

• 2 electrons

How many elements are there in the third row of the periodic table?

• 2 elements

• 18 elements

• 10 elements

• 8 elements

According to the video, how many electrons can the fourth shell hold?

• 18 electrons

• 10 electrons

• 32 electrons

• 8 electrons

What matches the number of electrons needed to fill the third shell?

• Number of elements in the second row

• Number of elements in the third row

• Number of elements in the fourth row

• Number of elements in the first row

What role do valence electrons play in an atom?

• They determine the atom's stability only

• They determine the atom's radioactive properties

• They determine the atom's core properties

• They determine the atom's chemical properties

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Which property is NOT directly influenced by the valence electrons?

• Atomic mass

• Hardness

• Color

• Electrical conductivity

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