2. Atoms & Elements

Which element on the periodic table has 55 protons?

What is the charge on the copper ion in the compound CuF_2?

What is the charge on a magnesium ion (Mg)?

Which of the following best describes the element chlorine (Cl) on the periodic table?

What is the typical ionic charge of halogens when they form ions?

Which element on the periodic table has the greatest number of protons in its nucleus?

What is the charge on the barium ion (Ba)?

Which of the following ions has five electrons in its outermost d subshell?

Which of the following elements will likely form a negative ion (anion) in its ionic compounds?

Which ionic charge is most commonly formed by elements in the alkaline earth metal family?

The first three ionization energies (in kJ/mol) of a third-period element are: 496, 4562, and 6912. To which element do these ionization values most likely belong?

Which of the following elements is most likely to form a +2 ion?

Which of the following elements has the same number of energy levels (principal shells) as nitrogen?

What is the typical charge on a magnesium (Mg) ion when it forms an ionic compound?

What is the charge of the sodium ion (Na)?