Which particles make up the nucleus of an oxygen atom?

What are the electrons in an atom's outermost occupied shell called?

How many occupied electron shells does the pictured atom have?

Which quantity increases from one element to the next in the modern periodic table?

For main-group elements in Groups 13–18, excluding helium, how do you find the number of outer-shell electrons from the IUPAC group number?

What do the elements in this periodic-table excerpt have in common?

Use the periodic-table excerpt. How many dots belong around In in its electron dot diagram?

Which periodic-table group matches the pictured atom's electron dot diagram?

Using the excerpt, how many outer-shell electrons does a neutral Sn atom have?

What does each dot around B represent in this diagram?

When drawing an electron dot symbol, what is the greatest number of dots placed on one side?

Which electron dot symbol correctly represents a neutral Be atom?

How many unpaired electrons are represented in the pictured electron dot diagram?

For helium, how many electrons fill its outermost shell?

Why does neon rarely form chemical bonds?

When lithium forms its usual ion, what happens?

Which change produces the usual fluoride ion from a neutral fluorine atom?

Which behavior is typical of carbon when it bonds with other nonmetals?

To reach a noble-gas arrangement, a strontium atom typically ___.

How many electrons must a neutral sulfur atom gain to complete an octet?