Which group of elements,indicated by letter on the periodic table,has electrons with the ground-state valence-shell electron configuration ns2 np4? 
Definitions:
Controllable Margin
The portion of profit or margin that can be directly influenced by management decisions and actions.
Operating Assets
Assets used in the daily operations of a business to generate revenue, including cash, inventory, and equipment.
Return on Investment
A performance measure used to evaluate the efficiency of an investment or compare the efficiencies of several different investments.
Flexible Budgets
Financial plans that can be adjusted or modified to take into account changes in volume of operations or activity levels, allowing for more accurate budgeting.
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