9. Electrons in Atoms and the Periodic Table

How many valence electrons does bromine (Br), a group 17 halogen, have?

In a simplified model of chemical bonding, what most directly determines an atom's reactivity?

Which element typically has 6 valence electrons in its outermost shell (main-group elements)?

How many valence electrons are in an atom of carbon (C)?

Which element has two valence electrons?

Which element has 7 valence electrons?

In a simplified model of atomic structure, how an atom reacts chemically depends primarily on which of the following?

In an atom, which type of electron is primarily available to form chemical bonds?

In an atom, which part is primarily responsible for chemical bonding between atoms?

In introductory chemistry, the chemical behavior (reactivity) of an atom is determined primarily by which of the following?

In an atom, which part is primarily responsible for chemical bonding (and thus chemical reactivity)?

For a main-group element, what is the simplest way to determine how many valence electrons it has using the periodic table?

Which element typically has 3 valence electrons (based on its main-group periodic table group)?

In a simplified valence-electron model for main-group elements, how many valence electrons does beryllium (Be) have?

How many valence electrons does fluorine (F) have?