10. Periodic Properties of the Elements

Which of the following best describes valence electrons and explains their importance in chemistry?

How many valence electrons does a nitrogen atom have?

What is the total number of electrons required to completely fill the fourth main energy level (n = 4) of an atom?

How many valence electrons does a sodium (Na) atom have?

How many valence electrons does sodium (Na) have?

What is the total number of valence electrons in an atom of boron (B) in its ground state?

How many valence electrons does helium (He) have?

How many valence electrons does the element lead (Pb) have?

Which of the following statements correctly describes hydrogen?

What happens to the valence electrons in a covalent bond?

Which of the following elements has 8 valence electrons?

How many valence electrons are present in a neutral atom of neon (Ne)?

Which of the following best describes the significance of valence electrons in an atom?

Which of the following is the correct number of valence electrons for the molecule NH2OH (hydroxylamine)?

How many valence electrons are present in the ground-state electron configuration of a nitrogen atom?