10. Periodic Properties of the Elements

Which of the following represents the valence electron configuration for a beryllium (Be) atom?

How many valence electrons does magnesium (Mg) have?

How many valence electrons does a sulfur (S) atom have?

Which subshell holds the valence electrons of barium (Ba)?

How many valence electrons does an oxygen atom have?

How many electrons are present in the outer (valence) shell of an Al^{3+} ion?

Which part of the atom primarily determines how an element interacts in a chemical reaction?

How many total valence electrons are present in a molecule of CO_2?

How many unpaired electrons are present in a ground-state boron (B) atom?

In the molecule Br2 and the ion Br-, how many pairs of valence electrons does each bromine atom possess?

How many valence electrons does a neutral atom of tungsten (W) have?

How many valence electrons does a silicon (Si) atom have?

Which of the following represents the number of valence electrons in a nitrogen atom in its ground state?

Which term refers to the electrons located in the outermost shell or energy level of an atom?

How many valence electrons are present in a carbon dioxide (CO_2) molecule?