They have the same number of electrons in their outermost shell
Explanation:
Lithium, sodium, potassium, rubidium, cesium and francium are in the same column on the periodic table because they have the same number of electrons in their outermost shell.
- The periodic table is based on the precepts of the modern periodic law which states that "the properties of elements are a periodic function of their atomic number".
- In the table elements having the same number of electrons in the outermost shell of their atoms are placed over one another in vertical columns.
- Each of the resulting vertical column is known as a group or family.
- The given elements belongs to the first family on the periodic table.
- In this group, all the elements have just one electron in their outermost shell.
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Answer: B. changing muscle length
Explanation:
Isometric exercise is a kind of exercise which provides strength to the body. In this exercise the muscle length and angle of the muscle do not change during the process of contraction of muscles during exercise. Several calories can be burned if the exercise is done with conscious efforts. The isometric exercise is performed in static positions, dynamic range of motions does not occur.
I would say D. because you round to the nearest whole number and 0.04 is way less than 0.5 which is a good rounding up number.
