Which of the following elements has the electron configuration 1s22s22p63s23p64s23d7?

Draw the Lewis electron structure for the HI molecule.

An atom has a valence shell electron configuration of ns2. To which group of metals in the periodic table does it belong?

What is the electron configuration of a chromium atom?

Perform the indicated operations. If possible, reduce the answer to its lowest terms. – ÷

Find the least common multiple of the numbers.1250 and 1800

Graph the integer on the number line.-8

Find the greatest common divisor of the numbers.388 and 970

Round the number to the given place value.In the past year, a company spent $793,749,766 on advertising. Round the advertising figure to the nearest hundred thousand.

The philosophy (general idea) behind a planned economy is:   ‘Leave it alone…  Everything will work it’s way out to the way it should be.’