Refer to Figure 1 for questions 1-6.

Below are the data for ionization energies of three elements X, Y, and Z. These elements are on the third peroid of the periodic table. The first four ionization energies for elements X, Y, and Z are given below in values of kJ/mol.

Figure 1: Ionization energies in kJ/mol for selected elements.

Which of the unknown elements would you expect to share chemical properties with strontium (Sr)?

Why are atomic halogens relatively reactive?

Which of the following is not a property of the noble gases?

The periodic table of elements is organized in order of atomic number, whic describes how many protons are found in the atom's nucleus. The position of the element in the periodic table can also yield insight into how that atom will respond to other atoms and how it will participate in a chemical reaction.

Sodium is found in the alkali metal group on the periodic table. What type of ion would you expect sodium to form in order to achieve a stable octet?

Below are the data for ionization energies of three elements X, Y, and Z. These elements are on the third peroid of the periodic table. The first four ionization energies for elements X, Y, and Z are given below in values of kJ/mol.

Figure 1: Ionization energies in kJ/mol for selected elements.

Which element(s) react(s) violently with water?