Numbers 1 through 4 are used to identify four different elements. Based on periodic table trends, which number identifies the element that is expected to have the greatest tendency to attract a shared pair of electrons?  

Matter is anything that has mass and occupies space.

Reference: Ref 2-1 Use the periodic table above to show where the noble gases are located.

Ocean acidification is:

Density is an example of:

Atoms of the same element with different mass numbers are called:

On a Periodic Table, the columns of elements with similar properties are:

Calculate the  molar mass of Ba(NO3)2

Putting more resistance into a parallel circuit 

The voltage drop across a series connected shorted component