elements are organized on the periodic table based on their properties. which statement correctly predicts…

elements are organized on the periodic table based on their properties. which statement correctly predicts and explains the chemical reactivity of two metals?\n○ rubidium (rb) is more reactive than strontium (sr) because strontium atoms must lose more electrons.\n○ sodium (na) is more reactive than magnesium (mg) because sodium atoms must gain more electrons.\n○ calcium (ca) is less reactive than potassium (k) because potassium atoms must lose more electrons.\n○ beryllium (be) is less reactive than lithium (li) because beryllium atoms must gain more electrons.

elements are organized on the periodic table based on their properties. which statement correctly predicts and explains the chemical reactivity of two metals?\n○ rubidium (rb) is more reactive than strontium (sr) because strontium atoms must lose more electrons.\n○ sodium (na) is more reactive than magnesium (mg) because sodium atoms must gain more electrons.\n○ calcium (ca) is less reactive than potassium (k) because potassium atoms must lose more electrons.\n○ beryllium (be) is less reactive than lithium (li) because beryllium atoms must gain more electrons.

Answer

Brief Explanations:

Metals tend to lose electrons in chemical reactions. Reactivity of metals increases as the ease of losing electrons increases. Rubidium is in Group 1 and Strontium is in Group 2. Rubidium needs to lose 1 electron while Strontium needs to lose 2 electrons. It's easier for Rubidium to lose an electron, making it more reactive. Sodium and magnesium are also in different groups with sodium in Group 1 (losing 1 electron) and magnesium in Group 2 (losing 2 electrons), so sodium is more reactive. Calcium and potassium - potassium in Group 1 loses 1 electron and calcium in Group 2 loses 2 electrons, potassium is more reactive. Beryllium in Group 2 and lithium in Group 1, lithium is more reactive as it loses 1 electron more easily than beryllium losing 2 electrons.

Answer:

A. Rubidium (Rb) is more reactive than strontium (Sr) because strontium atoms must lose more electrons.