What is true about the element francium(Fr,atomic number 87)? Choose all that apply.
a. it has 7 valence electrons
b. it is likely to form ionic bonds
c. it is a nonmetal
d. it is in period 7
e. it is a metal
Is the answer a,d,e?
Yes, that is correct.
To determine which statements are true about the element francium (Fr, atomic number 87), we need to analyze its key properties.
First, to find the number of valence electrons for an element, we can refer to its position on the periodic table. Francium is in Group 1, so it has one valence electron, not 7. Therefore, statement a is false.
Next, let's consider if francium is likely to form ionic bonds. Since francium is a highly reactive alkali metal, it tends to lose that single valence electron and form a cation. Therefore, statement b is true, and francium is likely to form ionic bonds.
Now, let's determine if francium is a nonmetal or a metal. Francium is in Group 1, which is known as the alkali metals group. All the elements in this group are metals, including francium. Thus, statement c is false, and francium is not a nonmetal. Instead, it is a metal.
Lastly, let's verify if francium is in period 7. To find the period number, we count the number of energy levels occupied by the element's electrons. As francium is found in the seventh row of the periodic table, it is indeed in period 7. Therefore, statement d is true.
Considering the above analysis, the statements that are true about francium are b, d, and e.