Textbook Question
(a) True or false: An element's number of valence electrons is the same as its atomic number.
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(a) True or false: An element's number of valence electrons is the same as its atomic number.
(b) How many valence electrons does a nitrogen atom possess?
(c) An atom has the electron configuration 1s22s22p63s23p2. How many valence electrons does the atom have?
Consider the element silicon, Si. (c) Which subshells hold the valence electrons?
(a) Write the electron configuration for the element titanium, Ti. How many valence electrons does this atom possess?
(b) Hafnium, Hf, is also found in group 4. Write the electron configuration for Hf.